21000025

素因数分解:

$5^2\times {\mathrm{71}}^1\times {\mathrm{11831}}^1$

素因数の和:11912

約数の個数: 12

約数和(自身を含む): 26409024

約数和(自身を除く): 5408999

約数列:

[1, 5, 25, 71, 355, 1775, 11831, 59155, 295775, 840001, 4200005, 21000025]

約数ペア:

[(1, 21000025), (5, 4200005), (25, 840001), (71, 295775), (355, 59155), (1775, 11831)]