21428619

素因数分解:

$3^1\times {\mathrm{17}}^1\times {\mathrm{89}}^1\times {\mathrm{4721}}^1$

素因数の和:4830

約数の個数: 16

約数和(自身を含む): 30598560

約数和(自身を除く): 9169941

約数列:

[1, 3, 17, 51, 89, 267, 1513, 4539, 4721, 14163, 80257, 240771, 420169, 1260507, 7142873, 21428619]

約数ペア:

[(1, 21428619), (3, 7142873), (17, 1260507), (51, 420169), (89, 240771), (267, 80257), (1513, 14163), (4539, 4721)]