21499790

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{165383}}^1$

素因数の和:165403

約数の個数: 16

約数和(自身を含む): 41676768

約数和(自身を除く): 20176978

約数列:

[1, 2, 5, 10, 13, 26, 65, 130, 165383, 330766, 826915, 1653830, 2149979, 4299958, 10749895, 21499790]

約数ペア:

[(1, 21499790), (2, 10749895), (5, 4299958), (10, 2149979), (13, 1653830), (26, 826915), (65, 330766), (130, 165383)]