21118708

素因数分解:

$2^2\times {\mathrm{13}}^1\times {\mathrm{103}}^1\times {\mathrm{3943}}^1$

素因数の和:4063

約数の個数: 24

約数和(自身を含む): 40197248

約数和(自身を除く): 19078540

約数列:

[1, 2, 4, 13, 26, 52, 103, 206, 412, 1339, 2678, 3943, 5356, 7886, 15772, 51259, 102518, 205036, 406129, 812258, 1624516, 5279677, 10559354, 21118708]

約数ペア:

[(1, 21118708), (2, 10559354), (4, 5279677), (13, 1624516), (26, 812258), (52, 406129), (103, 205036), (206, 102518), (412, 51259), (1339, 15772), (2678, 7886), (3943, 5356)]