21107745

素因数分解:

$3^2\times 5^1\times {\mathrm{31}}^1\times {\mathrm{15131}}^1$

素因数の和:15173

約数の個数: 24

約数和(自身を含む): 37769472

約数和(自身を除く): 16661727

約数列:

[1, 3, 5, 9, 15, 31, 45, 93, 155, 279, 465, 1395, 15131, 45393, 75655, 136179, 226965, 469061, 680895, 1407183, 2345305, 4221549, 7035915, 21107745]

約数ペア:

[(1, 21107745), (3, 7035915), (5, 4221549), (9, 2345305), (15, 1407183), (31, 680895), (45, 469061), (93, 226965), (155, 136179), (279, 75655), (465, 45393), (1395, 15131)]