18998890

素因数分解:

$2^1\times 5^1\times {\mathrm{71}}^1\times {\mathrm{26759}}^1$

素因数の和:26837

約数の個数: 16

約数和(自身を含む): 34680960

約数和(自身を除く): 15682070

約数列:

[1, 2, 5, 10, 71, 142, 355, 710, 26759, 53518, 133795, 267590, 1899889, 3799778, 9499445, 18998890]

約数ペア:

[(1, 18998890), (2, 9499445), (5, 3799778), (10, 1899889), (71, 267590), (142, 133795), (355, 53518), (710, 26759)]