18915080

素因数分解:

$2^3\times 5^1\times {\mathrm{487}}^1\times {\mathrm{971}}^1$

素因数の和:1469

約数の個数: 32

約数和(自身を含む): 42690240

約数和(自身を除く): 23775160

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 487, 971, 974, 1942, 1948, 2435, 3884, 3896, 4855, 4870, 7768, 9710, 9740, 19420, 19480, 38840, 472877, 945754, 1891508, 2364385, 3783016, 4728770, 9457540, 18915080]

約数ペア:

[(1, 18915080), (2, 9457540), (4, 4728770), (5, 3783016), (8, 2364385), (10, 1891508), (20, 945754), (40, 472877), (487, 38840), (971, 19480), (974, 19420), (1942, 9740), (1948, 9710), (2435, 7768), (3884, 4870), (3896, 4855)]