20200985

素因数分解:

$5^1\times 7^3\times {\mathrm{11779}}^1$

素因数の和:11805

約数の個数: 16

約数和(自身を含む): 28272000

約数和(自身を除く): 8071015

約数列:

[1, 5, 7, 35, 49, 245, 343, 1715, 11779, 58895, 82453, 412265, 577171, 2885855, 4040197, 20200985]

約数ペア:

[(1, 20200985), (5, 4040197), (7, 2885855), (35, 577171), (49, 412265), (245, 82453), (343, 58895), (1715, 11779)]