90178640

素因数分解:

$2^4\times 5^1\times {\mathrm{821}}^1\times {\mathrm{1373}}^1$

素因数の和:2207

約数の個数: 40

約数和(自身を含む): 210073608

約数和(自身を除く): 119894968

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 821, 1373, 1642, 2746, 3284, 4105, 5492, 6568, 6865, 8210, 10984, 13136, 13730, 16420, 21968, 27460, 32840, 54920, 65680, 109840, 1127233, 2254466, 4508932, 5636165, 9017864, 11272330, 18035728, 22544660, 45089320, 90178640]

約数ペア:

[(1, 90178640), (2, 45089320), (4, 22544660), (5, 18035728), (8, 11272330), (10, 9017864), (16, 5636165), (20, 4508932), (40, 2254466), (80, 1127233), (821, 109840), (1373, 65680), (1642, 54920), (2746, 32840), (3284, 27460), (4105, 21968), (5492, 16420), (6568, 13730), (6865, 13136), (8210, 10984)]