21752680

素因数分解:

$2^3\times 5^1\times {\mathrm{691}}^1\times {\mathrm{787}}^1$

素因数の和:1489

約数の個数: 32

約数和(自身を含む): 49076640

約数和(自身を除く): 27323960

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 691, 787, 1382, 1574, 2764, 3148, 3455, 3935, 5528, 6296, 6910, 7870, 13820, 15740, 27640, 31480, 543817, 1087634, 2175268, 2719085, 4350536, 5438170, 10876340, 21752680]

約数ペア:

[(1, 21752680), (2, 10876340), (4, 5438170), (5, 4350536), (8, 2719085), (10, 2175268), (20, 1087634), (40, 543817), (691, 31480), (787, 27640), (1382, 15740), (1574, 13820), (2764, 7870), (3148, 6910), (3455, 6296), (3935, 5528)]