20397555

素因数分解:

$3^3\times 5^1\times {\mathrm{139}}^1\times {\mathrm{1087}}^1$

素因数の和:1240

約数の個数: 32

約数和(自身を含む): 36556800

約数和(自身を除く): 16159245

約数列:

[1, 3, 5, 9, 15, 27, 45, 135, 139, 417, 695, 1087, 1251, 2085, 3261, 3753, 5435, 6255, 9783, 16305, 18765, 29349, 48915, 146745, 151093, 453279, 755465, 1359837, 2266395, 4079511, 6799185, 20397555]

約数ペア:

[(1, 20397555), (3, 6799185), (5, 4079511), (9, 2266395), (15, 1359837), (27, 755465), (45, 453279), (135, 151093), (139, 146745), (417, 48915), (695, 29349), (1087, 18765), (1251, 16305), (2085, 9783), (3261, 6255), (3753, 5435)]