20057121

素因数分解:

$3^2\times 7^2\times {\mathrm{45481}}^1$

素因数の和:45501

約数の個数: 18

約数和(自身を含む): 33702162

約数和(自身を除く): 13645041

約数列:

[1, 3, 7, 9, 21, 49, 63, 147, 441, 45481, 136443, 318367, 409329, 955101, 2228569, 2865303, 6685707, 20057121]

約数ペア:

[(1, 20057121), (3, 6685707), (7, 2865303), (9, 2228569), (21, 955101), (49, 409329), (63, 318367), (147, 136443), (441, 45481)]