21010661

素因数分解:

$7^2\times {\mathrm{23}}^1\times {\mathrm{103}}^1\times {\mathrm{181}}^1$

素因数の和:321

約数の個数: 24

約数和(自身を含む): 25893504

約数和(自身を除く): 4882843

約数列:

[1, 7, 23, 49, 103, 161, 181, 721, 1127, 1267, 2369, 4163, 5047, 8869, 16583, 18643, 29141, 116081, 130501, 203987, 428789, 913507, 3001523, 21010661]

約数ペア:

[(1, 21010661), (7, 3001523), (23, 913507), (49, 428789), (103, 203987), (161, 130501), (181, 116081), (721, 29141), (1127, 18643), (1267, 16583), (2369, 8869), (4163, 5047)]