20970475

素因数分解:

$5^2\times {\mathrm{41}}^2\times {\mathrm{499}}^1$

素因数の和:591

約数の個数: 18

約数和(自身を含む): 26706500

約数和(自身を除く): 5736025

約数列:

[1, 5, 25, 41, 205, 499, 1025, 1681, 2495, 8405, 12475, 20459, 42025, 102295, 511475, 838819, 4194095, 20970475]

約数ペア:

[(1, 20970475), (5, 4194095), (25, 838819), (41, 511475), (205, 102295), (499, 42025), (1025, 20459), (1681, 12475), (2495, 8405)]