19665820

素因数分解:

$2^2\times 5^1\times {\mathrm{157}}^1\times {\mathrm{6263}}^1$

素因数の和:6429

約数の個数: 24

約数和(自身を含む): 41567904

約数和(自身を除く): 21902084

約数列:

[1, 2, 4, 5, 10, 20, 157, 314, 628, 785, 1570, 3140, 6263, 12526, 25052, 31315, 62630, 125260, 983291, 1966582, 3933164, 4916455, 9832910, 19665820]

約数ペア:

[(1, 19665820), (2, 9832910), (4, 4916455), (5, 3933164), (10, 1966582), (20, 983291), (157, 125260), (314, 62630), (628, 31315), (785, 25052), (1570, 12526), (3140, 6263)]