21521129

素因数分解:

$7^1\times {\mathrm{19}}^1\times {\mathrm{103}}^1\times {\mathrm{1571}}^1$

素因数の和:1700

約数の個数: 16

約数和(自身を含む): 26158080

約数和(自身を除く): 4636951

約数列:

[1, 7, 19, 103, 133, 721, 1571, 1957, 10997, 13699, 29849, 161813, 208943, 1132691, 3074447, 21521129]

約数ペア:

[(1, 21521129), (7, 3074447), (19, 1132691), (103, 208943), (133, 161813), (721, 29849), (1571, 13699), (1957, 10997)]