20813090

素因数分解:

$2^1\times 5^1\times {\mathrm{31}}^1\times {\mathrm{67139}}^1$

素因数の和:67177

約数の個数: 16

約数和(自身を含む): 38672640

約数和(自身を除く): 17859550

約数列:

[1, 2, 5, 10, 31, 62, 155, 310, 67139, 134278, 335695, 671390, 2081309, 4162618, 10406545, 20813090]

約数ペア:

[(1, 20813090), (2, 10406545), (5, 4162618), (10, 2081309), (31, 671390), (62, 335695), (155, 134278), (310, 67139)]