18826840

素因数分解:

$2^3\times 5^1\times {\mathrm{433}}^1\times {\mathrm{1087}}^1$

素因数の和:1531

約数の個数: 32

約数和(自身を含む): 42497280

約数和(自身を除く): 23670440

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 433, 866, 1087, 1732, 2165, 2174, 3464, 4330, 4348, 5435, 8660, 8696, 10870, 17320, 21740, 43480, 470671, 941342, 1882684, 2353355, 3765368, 4706710, 9413420, 18826840]

約数ペア:

[(1, 18826840), (2, 9413420), (4, 4706710), (5, 3765368), (8, 2353355), (10, 1882684), (20, 941342), (40, 470671), (433, 43480), (866, 21740), (1087, 17320), (1732, 10870), (2165, 8696), (2174, 8660), (3464, 5435), (4330, 4348)]