21921640

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{42157}}^1$

素因数の和:42181

約数の個数: 32

約数和(自身を含む): 53119080

約数和(自身を除く): 31197440

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 104, 130, 260, 520, 42157, 84314, 168628, 210785, 337256, 421570, 548041, 843140, 1096082, 1686280, 2192164, 2740205, 4384328, 5480410, 10960820, 21921640]

約数ペア:

[(1, 21921640), (2, 10960820), (4, 5480410), (5, 4384328), (8, 2740205), (10, 2192164), (13, 1686280), (20, 1096082), (26, 843140), (40, 548041), (52, 421570), (65, 337256), (104, 210785), (130, 168628), (260, 84314), (520, 42157)]