20000905

素因数分解:

$5^1\times {\mathrm{37}}^1\times {\mathrm{73}}^1\times {\mathrm{1481}}^1$

素因数の和:1596

約数の個数: 16

約数和(自身を含む): 25004304

約数和(自身を除く): 5003399

約数列:

[1, 5, 37, 73, 185, 365, 1481, 2701, 7405, 13505, 54797, 108113, 273985, 540565, 4000181, 20000905]

約数ペア:

[(1, 20000905), (5, 4000181), (37, 540565), (73, 273985), (185, 108113), (365, 54797), (1481, 13505), (2701, 7405)]