20689825

素因数分解:

$5^2\times {\mathrm{13}}^2\times {\mathrm{59}}^1\times {\mathrm{83}}^1$

素因数の和:178

約数の個数: 36

約数和(自身を含む): 28591920

約数和(自身を除く): 7902095

約数列:

[1, 5, 13, 25, 59, 65, 83, 169, 295, 325, 415, 767, 845, 1079, 1475, 2075, 3835, 4225, 4897, 5395, 9971, 14027, 19175, 24485, 26975, 49855, 63661, 70135, 122425, 249275, 318305, 350675, 827593, 1591525, 4137965, 20689825]

約数ペア:

[(1, 20689825), (5, 4137965), (13, 1591525), (25, 827593), (59, 350675), (65, 318305), (83, 249275), (169, 122425), (295, 70135), (325, 63661), (415, 49855), (767, 26975), (845, 24485), (1079, 19175), (1475, 14027), (2075, 9971), (3835, 5395), (4225, 4897)]