20640009

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{137}}^1\times {\mathrm{3863}}^1$

素因数の和:4016

約数の個数: 16

約数和(自身を含む): 29860992

約数和(自身を除く): 9220983

約数列:

[1, 3, 13, 39, 137, 411, 1781, 3863, 5343, 11589, 50219, 150657, 529231, 1587693, 6880003, 20640009]

約数ペア:

[(1, 20640009), (3, 6880003), (13, 1587693), (39, 529231), (137, 150657), (411, 50219), (1781, 11589), (3863, 5343)]