1390379920

素因数分解:

$2^4\times 5^1\times {\mathrm{821}}^1\times {\mathrm{21169}}^1$

素因数の和:22003

約数の個数: 40

約数和(自身を含む): 3236723640

約数和(自身を除く): 1846343720

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 821, 1642, 3284, 4105, 6568, 8210, 13136, 16420, 21169, 32840, 42338, 65680, 84676, 105845, 169352, 211690, 338704, 423380, 846760, 1693520, 17379749, 34759498, 69518996, 86898745, 139037992, 173797490, 278075984, 347594980, 695189960, 1390379920]

約数ペア:

[(1, 1390379920), (2, 695189960), (4, 347594980), (5, 278075984), (8, 173797490), (10, 139037992), (16, 86898745), (20, 69518996), (40, 34759498), (80, 17379749), (821, 1693520), (1642, 846760), (3284, 423380), (4105, 338704), (6568, 211690), (8210, 169352), (13136, 105845), (16420, 84676), (21169, 65680), (32840, 42338)]