19818940

素因数分解:

$2^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{71}}^1\times {\mathrm{821}}^1$

素因数の和:918

約数の個数: 48

約数和(自身を含む): 44743104

約数和(自身を除く): 24924164

約数列:

[1, 2, 4, 5, 10, 17, 20, 34, 68, 71, 85, 142, 170, 284, 340, 355, 710, 821, 1207, 1420, 1642, 2414, 3284, 4105, 4828, 6035, 8210, 12070, 13957, 16420, 24140, 27914, 55828, 58291, 69785, 116582, 139570, 233164, 279140, 291455, 582910, 990947, 1165820, 1981894, 3963788, 4954735, 9909470, 19818940]

約数ペア:

[(1, 19818940), (2, 9909470), (4, 4954735), (5, 3963788), (10, 1981894), (17, 1165820), (20, 990947), (34, 582910), (68, 291455), (71, 279140), (85, 233164), (142, 139570), (170, 116582), (284, 69785), (340, 58291), (355, 55828), (710, 27914), (821, 24140), (1207, 16420), (1420, 13957), (1642, 12070), (2414, 8210), (3284, 6035), (4105, 4828)]