638014715

素因数分解:

$5^1\times {\mathrm{13}}^2\times {\mathrm{281}}^1\times {\mathrm{2687}}^1$

素因数の和:2999

約数の個数: 24

約数和(自身を含む): 832301568

約数和(自身を除く): 194286853

約数列:

[1, 5, 13, 65, 169, 281, 845, 1405, 2687, 3653, 13435, 18265, 34931, 47489, 174655, 237445, 454103, 755047, 2270515, 3775235, 9815611, 49078055, 127602943, 638014715]

約数ペア:

[(1, 638014715), (5, 127602943), (13, 49078055), (65, 9815611), (169, 3775235), (281, 2270515), (845, 755047), (1405, 454103), (2687, 237445), (3653, 174655), (13435, 47489), (18265, 34931)]