20989910

素因数分解:

$2^1\times 5^1\times {\mathrm{29}}^1\times {\mathrm{72379}}^1$

素因数の和:72415

約数の個数: 16

約数和(自身を含む): 39085200

約数和(自身を除く): 18095290

約数列:

[1, 2, 5, 10, 29, 58, 145, 290, 72379, 144758, 361895, 723790, 2098991, 4197982, 10494955, 20989910]

約数ペア:

[(1, 20989910), (2, 10494955), (5, 4197982), (10, 2098991), (29, 723790), (58, 361895), (145, 144758), (290, 72379)]