20991528430

素因数分解:

$2^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{71}}^1\times {\mathrm{89}}^1\times {\mathrm{19541}}^1$

素因数の和:19725

約数の個数: 64

約数和(自身を含む): 41028819840

約数和(自身を除く): 20037291410

約数列:

[1, 2, 5, 10, 17, 34, 71, 85, 89, 142, 170, 178, 355, 445, 710, 890, 1207, 1513, 2414, 3026, 6035, 6319, 7565, 12070, 12638, 15130, 19541, 31595, 39082, 63190, 97705, 107423, 195410, 214846, 332197, 537115, 664394, 1074230, 1387411, 1660985, 1739149, 2774822, 3321970, 3478298, 6937055, 8695745, 13874110, 17391490, 23585987, 29565533, 47171974, 59131066, 117929935, 123479579, 147827665, 235859870, 246959158, 295655330, 617397895, 1234795790, 2099152843, 4198305686, 10495764215, 20991528430]

約数ペア:

[(1, 20991528430), (2, 10495764215), (5, 4198305686), (10, 2099152843), (17, 1234795790), (34, 617397895), (71, 295655330), (85, 246959158), (89, 235859870), (142, 147827665), (170, 123479579), (178, 117929935), (355, 59131066), (445, 47171974), (710, 29565533), (890, 23585987), (1207, 17391490), (1513, 13874110), (2414, 8695745), (3026, 6937055), (6035, 3478298), (6319, 3321970), (7565, 2774822), (12070, 1739149), (12638, 1660985), (15130, 1387411), (19541, 1074230), (31595, 664394), (39082, 537115), (63190, 332197), (97705, 214846), (107423, 195410)]