21651321

素因数分解:

$3^1\times {\mathrm{41}}^1\times {\mathrm{103}}^1\times {\mathrm{1709}}^1$

素因数の和:1856

約数の個数: 16

約数和(自身を含む): 29877120

約数和(自身を除く): 8225799

約数列:

[1, 3, 41, 103, 123, 309, 1709, 4223, 5127, 12669, 70069, 176027, 210207, 528081, 7217107, 21651321]

約数ペア:

[(1, 21651321), (3, 7217107), (41, 528081), (103, 210207), (123, 176027), (309, 70069), (1709, 12669), (4223, 5127)]