81221725

素因数分解:

$5^2\times {\mathrm{13}}^1\times {\mathrm{83}}^1\times {\mathrm{3011}}^1$

素因数の和:3117

約数の個数: 24

約数和(自身を含む): 109805472

約数和(自身を除く): 28583747

約数列:

[1, 5, 13, 25, 65, 83, 325, 415, 1079, 2075, 3011, 5395, 15055, 26975, 39143, 75275, 195715, 249913, 978575, 1249565, 3248869, 6247825, 16244345, 81221725]

約数ペア:

[(1, 81221725), (5, 16244345), (13, 6247825), (25, 3248869), (65, 1249565), (83, 978575), (325, 249913), (415, 195715), (1079, 75275), (2075, 39143), (3011, 26975), (5395, 15055)]