21238861

素因数分解:

$7^1\times {\mathrm{41}}^1\times {\mathrm{43}}^1\times {\mathrm{1721}}^1$

素因数の和:1812

約数の個数: 16

約数和(自身を含む): 25458048

約数和(自身を除く): 4219187

約数列:

[1, 7, 41, 43, 287, 301, 1721, 1763, 12047, 12341, 70561, 74003, 493927, 518021, 3034123, 21238861]

約数ペア:

[(1, 21238861), (7, 3034123), (41, 518021), (43, 493927), (287, 74003), (301, 70561), (1721, 12341), (1763, 12047)]