21540547

素因数分解:

$7^2\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{1361}}^1$

素因数の和:1411

約数の個数: 24

約数和(自身を含む): 27948240

約数和(自身を除く): 6407693

約数列:

[1, 7, 17, 19, 49, 119, 133, 323, 833, 931, 1361, 2261, 9527, 15827, 23137, 25859, 66689, 161959, 181013, 439603, 1133713, 1267091, 3077221, 21540547]

約数ペア:

[(1, 21540547), (7, 3077221), (17, 1267091), (19, 1133713), (49, 439603), (119, 181013), (133, 161959), (323, 66689), (833, 25859), (931, 23137), (1361, 15827), (2261, 9527)]