21242705

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{79}}^1\times {\mathrm{4889}}^1$

素因数の和:4984

約数の個数: 16

約数和(自身を含む): 28166400

約数和(自身を除く): 6923695

約数列:

[1, 5, 11, 55, 79, 395, 869, 4345, 4889, 24445, 53779, 268895, 386231, 1931155, 4248541, 21242705]

約数ペア:

[(1, 21242705), (5, 4248541), (11, 1931155), (55, 386231), (79, 268895), (395, 53779), (869, 24445), (4345, 4889)]