18966025

素因数分解:

$5^2\times {\mathrm{13}}^2\times {\mathrm{67}}^2$

素因数の和:170

約数の個数: 27

約数和(自身を含む): 25851861

約数和(自身を除く): 6885836

約数列:

[1, 5, 13, 25, 65, 67, 169, 325, 335, 845, 871, 1675, 4225, 4355, 4489, 11323, 21775, 22445, 56615, 58357, 112225, 283075, 291785, 758641, 1458925, 3793205, 18966025]

約数ペア:

[(1, 18966025), (5, 3793205), (13, 1458925), (25, 758641), (65, 291785), (67, 283075), (169, 112225), (325, 58357), (335, 56615), (845, 22445), (871, 21775), (1675, 11323), (4225, 4489)]