18639580

素因数分解:

$2^2\times 5^1\times {\mathrm{509}}^1\times {\mathrm{1831}}^1$

素因数の和:2349

約数の個数: 24

約数和(自身を含む): 39241440

約数和(自身を除く): 20601860

約数列:

[1, 2, 4, 5, 10, 20, 509, 1018, 1831, 2036, 2545, 3662, 5090, 7324, 9155, 10180, 18310, 36620, 931979, 1863958, 3727916, 4659895, 9319790, 18639580]

約数ペア:

[(1, 18639580), (2, 9319790), (4, 4659895), (5, 3727916), (10, 1863958), (20, 931979), (509, 36620), (1018, 18310), (1831, 10180), (2036, 9155), (2545, 7324), (3662, 5090)]