20782820

素因数分解:

$2^2\times 5^1\times {\mathrm{431}}^1\times {\mathrm{2411}}^1$

素因数の和:2851

約数の個数: 24

約数和(自身を含む): 43763328

約数和(自身を除く): 22980508

約数列:

[1, 2, 4, 5, 10, 20, 431, 862, 1724, 2155, 2411, 4310, 4822, 8620, 9644, 12055, 24110, 48220, 1039141, 2078282, 4156564, 5195705, 10391410, 20782820]

約数ペア:

[(1, 20782820), (2, 10391410), (4, 5195705), (5, 4156564), (10, 2078282), (20, 1039141), (431, 48220), (862, 24110), (1724, 12055), (2155, 9644), (2411, 8620), (4310, 4822)]