21958805

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{157}}^1\times {\mathrm{2543}}^1$

素因数の和:2716

約数の個数: 16

約数和(自身を含む): 28940544

約数和(自身を除く): 6981739

約数列:

[1, 5, 11, 55, 157, 785, 1727, 2543, 8635, 12715, 27973, 139865, 399251, 1996255, 4391761, 21958805]

約数ペア:

[(1, 21958805), (5, 4391761), (11, 1996255), (55, 399251), (157, 139865), (785, 27973), (1727, 12715), (2543, 8635)]