19780042

素因数分解:

$2^1\times {\mathrm{101}}^1\times {\mathrm{181}}^1\times {\mathrm{541}}^1$

素因数の和:825

約数の個数: 16

約数和(自身を含む): 30185064

約数和(自身を除く): 10405022

約数列:

[1, 2, 101, 181, 202, 362, 541, 1082, 18281, 36562, 54641, 97921, 109282, 195842, 9890021, 19780042]

約数ペア:

[(1, 19780042), (2, 9890021), (101, 195842), (181, 109282), (202, 97921), (362, 54641), (541, 36562), (1082, 18281)]