18780391

素因数分解:

$7^1\times {\mathrm{53}}^1\times {\mathrm{223}}^1\times {\mathrm{227}}^1$

素因数の和:510

約数の個数: 16

約数和(自身を含む): 22063104

約数和(自身を除く): 3282713

約数列:

[1, 7, 53, 223, 227, 371, 1561, 1589, 11819, 12031, 50621, 82733, 84217, 354347, 2682913, 18780391]

約数ペア:

[(1, 18780391), (7, 2682913), (53, 354347), (223, 84217), (227, 82733), (371, 50621), (1561, 12031), (1589, 11819)]