21239141

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{113}}^1\times {\mathrm{2441}}^1$

素因数の和:2572

約数の個数: 16

約数和(自身を含む): 26725248

約数和(自身を除く): 5486107

約数列:

[1, 7, 11, 77, 113, 791, 1243, 2441, 8701, 17087, 26851, 187957, 275833, 1930831, 3034163, 21239141]

約数ペア:

[(1, 21239141), (7, 3034163), (11, 1930831), (77, 275833), (113, 187957), (791, 26851), (1243, 17087), (2441, 8701)]