20722725

素因数分解:

$3^2\times 5^2\times {\mathrm{31}}^1\times {\mathrm{2971}}^1$

素因数の和:3018

約数の個数: 36

約数和(自身を含む): 38326912

約数和(自身を除く): 17604187

約数列:

[1, 3, 5, 9, 15, 25, 31, 45, 75, 93, 155, 225, 279, 465, 775, 1395, 2325, 2971, 6975, 8913, 14855, 26739, 44565, 74275, 92101, 133695, 222825, 276303, 460505, 668475, 828909, 1381515, 2302525, 4144545, 6907575, 20722725]

約数ペア:

[(1, 20722725), (3, 6907575), (5, 4144545), (9, 2302525), (15, 1381515), (25, 828909), (31, 668475), (45, 460505), (75, 276303), (93, 222825), (155, 133695), (225, 92101), (279, 74275), (465, 44565), (775, 26739), (1395, 14855), (2325, 8913), (2971, 6975)]