21112745

素因数分解:

$5^1\times {\mathrm{41}}^1\times {\mathrm{181}}^1\times {\mathrm{569}}^1$

素因数の和:796

約数の個数: 16

約数和(自身を含む): 26142480

約数和(自身を除く): 5029735

約数列:

[1, 5, 41, 181, 205, 569, 905, 2845, 7421, 23329, 37105, 102989, 116645, 514945, 4222549, 21112745]

約数ペア:

[(1, 21112745), (5, 4222549), (41, 514945), (181, 116645), (205, 102989), (569, 37105), (905, 23329), (2845, 7421)]