645840

素因数分解:

$2^4\times 3^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{23}}^1$

素因数の和:58

約数の個数: 160

約数和(自身を含む): 2499840

約数和(自身を除く): 1854000

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 13, 15, 16, 18, 20, 23, 24, 26, 27, 30, 36, 39, 40, 45, 46, 48, 52, 54, 60, 65, 69, 72, 78, 80, 90, 92, 104, 108, 115, 117, 120, 130, 135, 138, 144, 156, 180, 184, 195, 207, 208, 216, 230, 234, 240, 260, 270, 276, 299, 312, 345, 351, 360, 368, 390, 414, 432, 460, 468, 520, 540, 552, 585, 598, 621, 624, 690, 702, 720, 780, 828, 897, 920, 936, 1035, 1040, 1080, 1104, 1170, 1196, 1242, 1380, 1404, 1495, 1560, 1656, 1755, 1794, 1840, 1872, 2070, 2160, 2340, 2392, 2484, 2691, 2760, 2808, 2990, 3105, 3120, 3312, 3510, 3588, 4140, 4485, 4680, 4784, 4968, 5382, 5520, 5616, 5980, 6210, 7020, 7176, 8073, 8280, 8970, 9360, 9936, 10764, 11960, 12420, 13455, 14040, 14352, 16146, 16560, 17940, 21528, 23920, 24840, 26910, 28080, 32292, 35880, 40365, 43056, 49680, 53820, 64584, 71760, 80730, 107640, 129168, 161460, 215280, 322920, 645840]

約数ペア:

[(1, 645840), (2, 322920), (3, 215280), (4, 161460), (5, 129168), (6, 107640), (8, 80730), (9, 71760), (10, 64584), (12, 53820), (13, 49680), (15, 43056), (16, 40365), (18, 35880), (20, 32292), (23, 28080), (24, 26910), (26, 24840), (27, 23920), (30, 21528), (36, 17940), (39, 16560), (40, 16146), (45, 14352), (46, 14040), (48, 13455), (52, 12420), (54, 11960), (60, 10764), (65, 9936), (69, 9360), (72, 8970), (78, 8280), (80, 8073), (90, 7176), (92, 7020), (104, 6210), (108, 5980), (115, 5616), (117, 5520), (120, 5382), (130, 4968), (135, 4784), (138, 4680), (144, 4485), (156, 4140), (180, 3588), (184, 3510), (195, 3312), (207, 3120), (208, 3105), (216, 2990), (230, 2808), (234, 2760), (240, 2691), (260, 2484), (270, 2392), (276, 2340), (299, 2160), (312, 2070), (345, 1872), (351, 1840), (360, 1794), (368, 1755), (390, 1656), (414, 1560), (432, 1495), (460, 1404), (468, 1380), (520, 1242), (540, 1196), (552, 1170), (585, 1104), (598, 1080), (621, 1040), (624, 1035), (690, 936), (702, 920), (720, 897), (780, 828)]