21356741

素因数分解:

$7^1\times {\mathrm{19}}^1\times {\mathrm{103}}^1\times {\mathrm{1559}}^1$

素因数の和:1688

約数の個数: 16

約数和(自身を含む): 25958400

約数和(自身を除く): 4601659

約数列:

[1, 7, 19, 103, 133, 721, 1559, 1957, 10913, 13699, 29621, 160577, 207347, 1124039, 3050963, 21356741]

約数ペア:

[(1, 21356741), (7, 3050963), (19, 1124039), (103, 207347), (133, 160577), (721, 29621), (1559, 13699), (1957, 10913)]