207817025

素因数分解:

$5^2\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{20627}}^1$

素因数の和:20681

約数の個数: 24

約数和(自身を含む): 286481664

約数和(自身を除く): 78664639

約数列:

[1, 5, 13, 25, 31, 65, 155, 325, 403, 775, 2015, 10075, 20627, 103135, 268151, 515675, 639437, 1340755, 3197185, 6703775, 8312681, 15985925, 41563405, 207817025]

約数ペア:

[(1, 207817025), (5, 41563405), (13, 15985925), (25, 8312681), (31, 6703775), (65, 3197185), (155, 1340755), (325, 639437), (403, 515675), (775, 268151), (2015, 103135), (10075, 20627)]