20818810

素因数分解:

$2^1\times 5^1\times {\mathrm{29}}^1\times {\mathrm{71789}}^1$

素因数の和:71825

約数の個数: 16

約数和(自身を含む): 38766600

約数和(自身を除く): 17947790

約数列:

[1, 2, 5, 10, 29, 58, 145, 290, 71789, 143578, 358945, 717890, 2081881, 4163762, 10409405, 20818810]

約数ペア:

[(1, 20818810), (2, 10409405), (5, 4163762), (10, 2081881), (29, 717890), (58, 358945), (145, 143578), (290, 71789)]