21985865

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{103}}^1\times {\mathrm{3881}}^1$

素因数の和:4000

約数の個数: 16

約数和(自身を含む): 29068416

約数和(自身を除く): 7082551

約数列:

[1, 5, 11, 55, 103, 515, 1133, 3881, 5665, 19405, 42691, 213455, 399743, 1998715, 4397173, 21985865]

約数ペア:

[(1, 21985865), (5, 4397173), (11, 1998715), (55, 399743), (103, 213455), (515, 42691), (1133, 19405), (3881, 5665)]