20989800

素因数分解:

$2^3\times 3^3\times 5^2\times {\mathrm{13}}^2\times {\mathrm{23}}^1$

素因数の和:74

約数の個数: 288

約数和(自身を含む): 81691200

約数和(自身を除く): 60701400

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 13, 15, 18, 20, 23, 24, 25, 26, 27, 30, 36, 39, 40, 45, 46, 50, 52, 54, 60, 65, 69, 72, 75, 78, 90, 92, 100, 104, 108, 115, 117, 120, 130, 135, 138, 150, 156, 169, 180, 184, 195, 200, 207, 216, 225, 230, 234, 260, 270, 276, 299, 300, 312, 325, 338, 345, 351, 360, 390, 414, 450, 460, 468, 507, 520, 540, 552, 575, 585, 598, 600, 621, 650, 675, 676, 690, 702, 780, 828, 845, 897, 900, 920, 936, 975, 1014, 1035, 1080, 1150, 1170, 1196, 1242, 1300, 1350, 1352, 1380, 1404, 1495, 1521, 1560, 1656, 1690, 1725, 1755, 1794, 1800, 1950, 2028, 2070, 2300, 2340, 2392, 2484, 2535, 2600, 2691, 2700, 2760, 2808, 2925, 2990, 3042, 3105, 3380, 3450, 3510, 3588, 3887, 3900, 4056, 4140, 4225, 4485, 4563, 4600, 4680, 4968, 5070, 5175, 5382, 5400, 5850, 5980, 6084, 6210, 6760, 6900, 7020, 7176, 7475, 7605, 7774, 7800, 8073, 8280, 8450, 8775, 8970, 9126, 10140, 10350, 10764, 11661, 11700, 11960, 12168, 12420, 12675, 13455, 13800, 14040, 14950, 15210, 15525, 15548, 16146, 16900, 17550, 17940, 18252, 19435, 20280, 20700, 21528, 22425, 22815, 23322, 23400, 24840, 25350, 26910, 29900, 30420, 31050, 31096, 32292, 33800, 34983, 35100, 35880, 36504, 38025, 38870, 40365, 41400, 44850, 45630, 46644, 50700, 53820, 58305, 59800, 60840, 62100, 64584, 67275, 69966, 70200, 76050, 77740, 80730, 89700, 91260, 93288, 97175, 101400, 104949, 107640, 114075, 116610, 124200, 134550, 139932, 152100, 155480, 161460, 174915, 179400, 182520, 194350, 201825, 209898, 228150, 233220, 269100, 279864, 291525, 304200, 322920, 349830, 388700, 403650, 419796, 456300, 466440, 524745, 538200, 583050, 699660, 777400, 807300, 839592, 874575, 912600, 1049490, 1166100, 1399320, 1614600, 1749150, 2098980, 2332200, 2623725, 3498300, 4197960, 5247450, 6996600, 10494900, 20989800]

約数ペア:

[(1, 20989800), (2, 10494900), (3, 6996600), (4, 5247450), (5, 4197960), (6, 3498300), (8, 2623725), (9, 2332200), (10, 2098980), (12, 1749150), (13, 1614600), (15, 1399320), (18, 1166100), (20, 1049490), (23, 912600), (24, 874575), (25, 839592), (26, 807300), (27, 777400), (30, 699660), (36, 583050), (39, 538200), (40, 524745), (45, 466440), (46, 456300), (50, 419796), (52, 403650), (54, 388700), (60, 349830), (65, 322920), (69, 304200), (72, 291525), (75, 279864), (78, 269100), (90, 233220), (92, 228150), (100, 209898), (104, 201825), (108, 194350), (115, 182520), (117, 179400), (120, 174915), (130, 161460), (135, 155480), (138, 152100), (150, 139932), (156, 134550), (169, 124200), (180, 116610), (184, 114075), (195, 107640), (200, 104949), (207, 101400), (216, 97175), (225, 93288), (230, 91260), (234, 89700), (260, 80730), (270, 77740), (276, 76050), (299, 70200), (300, 69966), (312, 67275), (325, 64584), (338, 62100), (345, 60840), (351, 59800), (360, 58305), (390, 53820), (414, 50700), (450, 46644), (460, 45630), (468, 44850), (507, 41400), (520, 40365), (540, 38870), (552, 38025), (575, 36504), (585, 35880), (598, 35100), (600, 34983), (621, 33800), (650, 32292), (675, 31096), (676, 31050), (690, 30420), (702, 29900), (780, 26910), (828, 25350), (845, 24840), (897, 23400), (900, 23322), (920, 22815), (936, 22425), (975, 21528), (1014, 20700), (1035, 20280), (1080, 19435), (1150, 18252), (1170, 17940), (1196, 17550), (1242, 16900), (1300, 16146), (1350, 15548), (1352, 15525), (1380, 15210), (1404, 14950), (1495, 14040), (1521, 13800), (1560, 13455), (1656, 12675), (1690, 12420), (1725, 12168), (1755, 11960), (1794, 11700), (1800, 11661), (1950, 10764), (2028, 10350), (2070, 10140), (2300, 9126), (2340, 8970), (2392, 8775), (2484, 8450), (2535, 8280), (2600, 8073), (2691, 7800), (2700, 7774), (2760, 7605), (2808, 7475), (2925, 7176), (2990, 7020), (3042, 6900), (3105, 6760), (3380, 6210), (3450, 6084), (3510, 5980), (3588, 5850), (3887, 5400), (3900, 5382), (4056, 5175), (4140, 5070), (4225, 4968), (4485, 4680), (4563, 4600)]