31356460

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^2\times {\mathrm{43}}^1\times {\mathrm{101}}^1$

素因数の和:191

約数の個数: 72

約数和(自身を含む): 71816976

約数和(自身を除く): 40460516

約数列:

[1, 2, 4, 5, 10, 19, 20, 38, 43, 76, 86, 95, 101, 172, 190, 202, 215, 361, 380, 404, 430, 505, 722, 817, 860, 1010, 1444, 1634, 1805, 1919, 2020, 3268, 3610, 3838, 4085, 4343, 7220, 7676, 8170, 8686, 9595, 15523, 16340, 17372, 19190, 21715, 31046, 36461, 38380, 43430, 62092, 72922, 77615, 82517, 86860, 145844, 155230, 165034, 182305, 310460, 330068, 364610, 412585, 729220, 825170, 1567823, 1650340, 3135646, 6271292, 7839115, 15678230, 31356460]

約数ペア:

[(1, 31356460), (2, 15678230), (4, 7839115), (5, 6271292), (10, 3135646), (19, 1650340), (20, 1567823), (38, 825170), (43, 729220), (76, 412585), (86, 364610), (95, 330068), (101, 310460), (172, 182305), (190, 165034), (202, 155230), (215, 145844), (361, 86860), (380, 82517), (404, 77615), (430, 72922), (505, 62092), (722, 43430), (817, 38380), (860, 36461), (1010, 31046), (1444, 21715), (1634, 19190), (1805, 17372), (1919, 16340), (2020, 15523), (3268, 9595), (3610, 8686), (3838, 8170), (4085, 7676), (4343, 7220)]