20406525

素因数分解:

$3^1\times 5^2\times {\mathrm{31}}^1\times {\mathrm{67}}^1\times {\mathrm{131}}^1$

素因数の和:242

約数の個数: 48

約数和(自身を含む): 35616768

約数和(自身を除く): 15210243

約数列:

[1, 3, 5, 15, 25, 31, 67, 75, 93, 131, 155, 201, 335, 393, 465, 655, 775, 1005, 1675, 1965, 2077, 2325, 3275, 4061, 5025, 6231, 8777, 9825, 10385, 12183, 20305, 26331, 31155, 43885, 51925, 60915, 101525, 131655, 155775, 219425, 272087, 304575, 658275, 816261, 1360435, 4081305, 6802175, 20406525]

約数ペア:

[(1, 20406525), (3, 6802175), (5, 4081305), (15, 1360435), (25, 816261), (31, 658275), (67, 304575), (75, 272087), (93, 219425), (131, 155775), (155, 131655), (201, 101525), (335, 60915), (393, 51925), (465, 43885), (655, 31155), (775, 26331), (1005, 20305), (1675, 12183), (1965, 10385), (2077, 9825), (2325, 8777), (3275, 6231), (4061, 5025)]