20198825

素因数分解:

$5^2\times {\mathrm{31}}^1\times {\mathrm{67}}^1\times {\mathrm{389}}^1$

素因数の和:497

約数の個数: 24

約数和(自身を含む): 26307840

約数和(自身を除く): 6109015

約数列:

[1, 5, 25, 31, 67, 155, 335, 389, 775, 1675, 1945, 2077, 9725, 10385, 12059, 26063, 51925, 60295, 130315, 301475, 651575, 807953, 4039765, 20198825]

約数ペア:

[(1, 20198825), (5, 4039765), (25, 807953), (31, 651575), (67, 301475), (155, 130315), (335, 60295), (389, 51925), (775, 26063), (1675, 12059), (1945, 10385), (2077, 9725)]