18813991

素因数分解:

$7^2\times {\mathrm{599}}^1\times {\mathrm{641}}^1$

素因数の和:1254

約数の個数: 12

約数和(自身を含む): 21956400

約数和(自身を除く): 3142409

約数列:

[1, 7, 49, 599, 641, 4193, 4487, 29351, 31409, 383959, 2687713, 18813991]

約数ペア:

[(1, 18813991), (7, 2687713), (49, 383959), (599, 31409), (641, 29351), (4193, 4487)]