389580920

素因数分解:

$2^3\times 5^1\times {\mathrm{821}}^1\times {\mathrm{11863}}^1$

素因数の和:12695

約数の個数: 32

約数和(自身を含む): 877698720

約数和(自身を除く): 488117800

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 821, 1642, 3284, 4105, 6568, 8210, 11863, 16420, 23726, 32840, 47452, 59315, 94904, 118630, 237260, 474520, 9739523, 19479046, 38958092, 48697615, 77916184, 97395230, 194790460, 389580920]

約数ペア:

[(1, 389580920), (2, 194790460), (4, 97395230), (5, 77916184), (8, 48697615), (10, 38958092), (20, 19479046), (40, 9739523), (821, 474520), (1642, 237260), (3284, 118630), (4105, 94904), (6568, 59315), (8210, 47452), (11863, 32840), (16420, 23726)]