18668740

素因数分解:

$2^2\times 5^1\times {\mathrm{71}}^1\times {\mathrm{13147}}^1$

素因数の和:13227

約数の個数: 24

約数和(自身を含む): 39759552

約数和(自身を除く): 21090812

約数列:

[1, 2, 4, 5, 10, 20, 71, 142, 284, 355, 710, 1420, 13147, 26294, 52588, 65735, 131470, 262940, 933437, 1866874, 3733748, 4667185, 9334370, 18668740]

約数ペア:

[(1, 18668740), (2, 9334370), (4, 4667185), (5, 3733748), (10, 1866874), (20, 933437), (71, 262940), (142, 131470), (284, 65735), (355, 52588), (710, 26294), (1420, 13147)]