21758260

素因数分解:

$2^2\times 5^1\times {\mathrm{401}}^1\times {\mathrm{2713}}^1$

素因数の和:3123

約数の個数: 24

約数和(自身を含む): 45823176

約数和(自身を除く): 24064916

約数列:

[1, 2, 4, 5, 10, 20, 401, 802, 1604, 2005, 2713, 4010, 5426, 8020, 10852, 13565, 27130, 54260, 1087913, 2175826, 4351652, 5439565, 10879130, 21758260]

約数ペア:

[(1, 21758260), (2, 10879130), (4, 5439565), (5, 4351652), (10, 2175826), (20, 1087913), (401, 54260), (802, 27130), (1604, 13565), (2005, 10852), (2713, 8020), (4010, 5426)]