21216716

素因数分解:

$2^2\times {\mathrm{43}}^1\times {\mathrm{293}}^1\times {\mathrm{421}}^1$

素因数の和:761

約数の個数: 24

約数和(自身を含む): 38212944

約数和(自身を除く): 16996228

約数列:

[1, 2, 4, 43, 86, 172, 293, 421, 586, 842, 1172, 1684, 12599, 18103, 25198, 36206, 50396, 72412, 123353, 246706, 493412, 5304179, 10608358, 21216716]

約数ペア:

[(1, 21216716), (2, 10608358), (4, 5304179), (43, 493412), (86, 246706), (172, 123353), (293, 72412), (421, 50396), (586, 36206), (842, 25198), (1172, 18103), (1684, 12599)]