21039790

素因数分解:

$2^1\times 5^1\times {\mathrm{29}}^1\times {\mathrm{72551}}^1$

素因数の和:72587

約数の個数: 16

約数和(自身を含む): 39178080

約数和(自身を除く): 18138290

約数列:

[1, 2, 5, 10, 29, 58, 145, 290, 72551, 145102, 362755, 725510, 2103979, 4207958, 10519895, 21039790]

約数ペア:

[(1, 21039790), (2, 10519895), (5, 4207958), (10, 2103979), (29, 725510), (58, 362755), (145, 145102), (290, 72551)]