21754481

素因数分解:

$7^2\times {\mathrm{23}}^1\times {\mathrm{97}}^1\times {\mathrm{199}}^1$

素因数の和:333

約数の個数: 24

約数和(自身を含む): 26812800

約数和(自身を除く): 5058319

約数列:

[1, 7, 23, 49, 97, 161, 199, 679, 1127, 1393, 2231, 4577, 4753, 9751, 15617, 19303, 32039, 109319, 135121, 224273, 443969, 945847, 3107783, 21754481]

約数ペア:

[(1, 21754481), (7, 3107783), (23, 945847), (49, 443969), (97, 224273), (161, 135121), (199, 109319), (679, 32039), (1127, 19303), (1393, 15617), (2231, 9751), (4577, 4753)]