18943421

素因数分解:

$7^1\times {\mathrm{23}}^1\times {\mathrm{97}}^1\times {\mathrm{1213}}^1$

素因数の和:1340

約数の個数: 16

約数和(自身を含む): 22842624

約数和(自身を除く): 3899203

約数列:

[1, 7, 23, 97, 161, 679, 1213, 2231, 8491, 15617, 27899, 117661, 195293, 823627, 2706203, 18943421]

約数ペア:

[(1, 18943421), (7, 2706203), (23, 823627), (97, 195293), (161, 117661), (679, 27899), (1213, 15617), (2231, 8491)]