19428025

素因数分解:

$5^2\times {\mathrm{17}}^2\times {\mathrm{2689}}^1$

素因数の和:2733

約数の個数: 18

約数和(自身を含む): 25600730

約数和(自身を除く): 6172705

約数列:

[1, 5, 17, 25, 85, 289, 425, 1445, 2689, 7225, 13445, 45713, 67225, 228565, 777121, 1142825, 3885605, 19428025]

約数ペア:

[(1, 19428025), (5, 3885605), (17, 1142825), (25, 777121), (85, 228565), (289, 67225), (425, 45713), (1445, 13445), (2689, 7225)]