20819870

素因数分解:

$2^1\times 5^1\times {\mathrm{977}}^1\times {\mathrm{2131}}^1$

素因数の和:3115

約数の個数: 16

約数和(自身を含む): 37531728

約数和(自身を除く): 16711858

約数列:

[1, 2, 5, 10, 977, 1954, 2131, 4262, 4885, 9770, 10655, 21310, 2081987, 4163974, 10409935, 20819870]

約数ペア:

[(1, 20819870), (2, 10409935), (5, 4163974), (10, 2081987), (977, 21310), (1954, 10655), (2131, 9770), (4262, 4885)]