20981400

素因数分解:

$2^3\times 3^1\times 5^2\times {\mathrm{11}}^2\times {\mathrm{17}}^2$

素因数の和:75

約数の個数: 216

約数和(自身を含む): 75945660

約数和(自身を除く): 54964260

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 11, 12, 15, 17, 20, 22, 24, 25, 30, 33, 34, 40, 44, 50, 51, 55, 60, 66, 68, 75, 85, 88, 100, 102, 110, 120, 121, 132, 136, 150, 165, 170, 187, 200, 204, 220, 242, 255, 264, 275, 289, 300, 330, 340, 363, 374, 408, 425, 440, 484, 510, 550, 561, 578, 600, 605, 660, 680, 726, 748, 825, 850, 867, 935, 968, 1020, 1100, 1122, 1156, 1210, 1275, 1320, 1445, 1452, 1496, 1650, 1700, 1734, 1815, 1870, 2040, 2057, 2200, 2244, 2312, 2420, 2550, 2805, 2890, 2904, 3025, 3179, 3300, 3400, 3468, 3630, 3740, 4114, 4335, 4488, 4675, 4840, 5100, 5610, 5780, 6050, 6171, 6358, 6600, 6936, 7225, 7260, 7480, 8228, 8670, 9075, 9350, 9537, 10200, 10285, 11220, 11560, 12100, 12342, 12716, 14025, 14450, 14520, 15895, 16456, 17340, 18150, 18700, 19074, 20570, 21675, 22440, 24200, 24684, 25432, 28050, 28900, 30855, 31790, 34680, 34969, 36300, 37400, 38148, 41140, 43350, 47685, 49368, 51425, 56100, 57800, 61710, 63580, 69938, 72600, 76296, 79475, 82280, 86700, 95370, 102850, 104907, 112200, 123420, 127160, 139876, 154275, 158950, 173400, 174845, 190740, 205700, 209814, 238425, 246840, 279752, 308550, 317900, 349690, 381480, 411400, 419628, 476850, 524535, 617100, 635800, 699380, 839256, 874225, 953700, 1049070, 1234200, 1398760, 1748450, 1907400, 2098140, 2622675, 3496900, 4196280, 5245350, 6993800, 10490700, 20981400]

約数ペア:

[(1, 20981400), (2, 10490700), (3, 6993800), (4, 5245350), (5, 4196280), (6, 3496900), (8, 2622675), (10, 2098140), (11, 1907400), (12, 1748450), (15, 1398760), (17, 1234200), (20, 1049070), (22, 953700), (24, 874225), (25, 839256), (30, 699380), (33, 635800), (34, 617100), (40, 524535), (44, 476850), (50, 419628), (51, 411400), (55, 381480), (60, 349690), (66, 317900), (68, 308550), (75, 279752), (85, 246840), (88, 238425), (100, 209814), (102, 205700), (110, 190740), (120, 174845), (121, 173400), (132, 158950), (136, 154275), (150, 139876), (165, 127160), (170, 123420), (187, 112200), (200, 104907), (204, 102850), (220, 95370), (242, 86700), (255, 82280), (264, 79475), (275, 76296), (289, 72600), (300, 69938), (330, 63580), (340, 61710), (363, 57800), (374, 56100), (408, 51425), (425, 49368), (440, 47685), (484, 43350), (510, 41140), (550, 38148), (561, 37400), (578, 36300), (600, 34969), (605, 34680), (660, 31790), (680, 30855), (726, 28900), (748, 28050), (825, 25432), (850, 24684), (867, 24200), (935, 22440), (968, 21675), (1020, 20570), (1100, 19074), (1122, 18700), (1156, 18150), (1210, 17340), (1275, 16456), (1320, 15895), (1445, 14520), (1452, 14450), (1496, 14025), (1650, 12716), (1700, 12342), (1734, 12100), (1815, 11560), (1870, 11220), (2040, 10285), (2057, 10200), (2200, 9537), (2244, 9350), (2312, 9075), (2420, 8670), (2550, 8228), (2805, 7480), (2890, 7260), (2904, 7225), (3025, 6936), (3179, 6600), (3300, 6358), (3400, 6171), (3468, 6050), (3630, 5780), (3740, 5610), (4114, 5100), (4335, 4840), (4488, 4675)]