20040865

素因数分解:

$5^1\times {\mathrm{13}}^2\times {\mathrm{37}}^1\times {\mathrm{641}}^1$

素因数の和:709

約数の個数: 24

約数和(自身を含む): 26786808

約数和(自身を除く): 6745943

約数列:

[1, 5, 13, 37, 65, 169, 185, 481, 641, 845, 2405, 3205, 6253, 8333, 23717, 31265, 41665, 108329, 118585, 308321, 541645, 1541605, 4008173, 20040865]

約数ペア:

[(1, 20040865), (5, 4008173), (13, 1541605), (37, 541645), (65, 308321), (169, 118585), (185, 108329), (481, 41665), (641, 31265), (845, 23717), (2405, 8333), (3205, 6253)]