20778385

素因数分解:

$5^1\times {\mathrm{53}}^1\times {\mathrm{89}}^1\times {\mathrm{881}}^1$

素因数の和:1028

約数の個数: 16

約数和(自身を含む): 25719120

約数和(自身を除く): 4940735

約数列:

[1, 5, 53, 89, 265, 445, 881, 4405, 4717, 23585, 46693, 78409, 233465, 392045, 4155677, 20778385]

約数ペア:

[(1, 20778385), (5, 4155677), (53, 392045), (89, 233465), (265, 78409), (445, 46693), (881, 23585), (4405, 4717)]