81980665

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{53}}^2\times {\mathrm{449}}^1$

素因数の和:573

約数の個数: 24

約数和(自身を含む): 108221400

約数和(自身を除く): 26240735

約数列:

[1, 5, 13, 53, 65, 265, 449, 689, 2245, 2809, 3445, 5837, 14045, 23797, 29185, 36517, 118985, 182585, 309361, 1261241, 1546805, 6306205, 16396133, 81980665]

約数ペア:

[(1, 81980665), (5, 16396133), (13, 6306205), (53, 1546805), (65, 1261241), (265, 309361), (449, 182585), (689, 118985), (2245, 36517), (2809, 29185), (3445, 23797), (5837, 14045)]