18327940

素因数分解:

$2^2\times 5^1\times {\mathrm{71}}^1\times {\mathrm{12907}}^1$

素因数の和:12987

約数の個数: 24

約数和(自身を含む): 39033792

約数和(自身を除く): 20705852

約数列:

[1, 2, 4, 5, 10, 20, 71, 142, 284, 355, 710, 1420, 12907, 25814, 51628, 64535, 129070, 258140, 916397, 1832794, 3665588, 4581985, 9163970, 18327940]

約数ペア:

[(1, 18327940), (2, 9163970), (4, 4581985), (5, 3665588), (10, 1832794), (20, 916397), (71, 258140), (142, 129070), (284, 64535), (355, 51628), (710, 25814), (1420, 12907)]