20902990

素因数分解:

$2^1\times 5^1\times {\mathrm{31}}^1\times {\mathrm{67429}}^1$

素因数の和:67467

約数の個数: 16

約数和(自身を含む): 38839680

約数和(自身を除く): 17936690

約数列:

[1, 2, 5, 10, 31, 62, 155, 310, 67429, 134858, 337145, 674290, 2090299, 4180598, 10451495, 20902990]

約数ペア:

[(1, 20902990), (2, 10451495), (5, 4180598), (10, 2090299), (31, 674290), (62, 337145), (155, 134858), (310, 67429)]