1720225

素因数分解:

$5^2\times {\mathrm{13}}^1\times {\mathrm{67}}^1\times {\mathrm{79}}^1$

素因数の和:169

約数の個数: 24

約数和(自身を含む): 2360960

約数和(自身を除く): 640735

約数列:

[1, 5, 13, 25, 65, 67, 79, 325, 335, 395, 871, 1027, 1675, 1975, 4355, 5135, 5293, 21775, 25675, 26465, 68809, 132325, 344045, 1720225]

約数ペア:

[(1, 1720225), (5, 344045), (13, 132325), (25, 68809), (65, 26465), (67, 25675), (79, 21775), (325, 5293), (335, 5135), (395, 4355), (871, 1975), (1027, 1675)]