19885820

素因数分解:

$2^2\times 5^1\times {\mathrm{41}}^1\times {\mathrm{24251}}^1$

素因数の和:24301

約数の個数: 24

約数和(自身を含む): 42780528

約数和(自身を除く): 22894708

約数列:

[1, 2, 4, 5, 10, 20, 41, 82, 164, 205, 410, 820, 24251, 48502, 97004, 121255, 242510, 485020, 994291, 1988582, 3977164, 4971455, 9942910, 19885820]

約数ペア:

[(1, 19885820), (2, 9942910), (4, 4971455), (5, 3977164), (10, 1988582), (20, 994291), (41, 485020), (82, 242510), (164, 121255), (205, 97004), (410, 48502), (820, 24251)]