20558840

素因数分解:

$2^3\times 5^1\times {\mathrm{433}}^1\times {\mathrm{1187}}^1$

素因数の和:1631

約数の個数: 32

約数和(自身を含む): 46403280

約数和(自身を除く): 25844440

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 433, 866, 1187, 1732, 2165, 2374, 3464, 4330, 4748, 5935, 8660, 9496, 11870, 17320, 23740, 47480, 513971, 1027942, 2055884, 2569855, 4111768, 5139710, 10279420, 20558840]

約数ペア:

[(1, 20558840), (2, 10279420), (4, 5139710), (5, 4111768), (8, 2569855), (10, 2055884), (20, 1027942), (40, 513971), (433, 47480), (866, 23740), (1187, 17320), (1732, 11870), (2165, 9496), (2374, 8660), (3464, 5935), (4330, 4748)]