20899687508

素因数分解:

$2^2\times 7^1\times {\mathrm{31}}^1\times {\mathrm{61}}^1\times {\mathrm{394721}}^1$

素因数の和:394824

約数の個数: 48

約数和(自身を含む): 43855193088

約数和(自身を除く): 22955505580

約数列:

[1, 2, 4, 7, 14, 28, 31, 61, 62, 122, 124, 217, 244, 427, 434, 854, 868, 1708, 1891, 3782, 7564, 13237, 26474, 52948, 394721, 789442, 1578884, 2763047, 5526094, 11052188, 12236351, 24077981, 24472702, 48155962, 48945404, 85654457, 96311924, 168545867, 171308914, 337091734, 342617828, 674183468, 746417411, 1492834822, 2985669644, 5224921877, 10449843754, 20899687508]

約数ペア:

[(1, 20899687508), (2, 10449843754), (4, 5224921877), (7, 2985669644), (14, 1492834822), (28, 746417411), (31, 674183468), (61, 342617828), (62, 337091734), (122, 171308914), (124, 168545867), (217, 96311924), (244, 85654457), (427, 48945404), (434, 48155962), (854, 24472702), (868, 24077981), (1708, 12236351), (1891, 11052188), (3782, 5526094), (7564, 2763047), (13237, 1578884), (26474, 789442), (52948, 394721)]