200020820

素因数分解:

$2^2\times 5^1\times {\mathrm{479}}^1\times {\mathrm{20879}}^1$

素因数の和:21367

約数の個数: 24

約数和(自身を含む): 420940800

約数和(自身を除く): 220919980

約数列:

[1, 2, 4, 5, 10, 20, 479, 958, 1916, 2395, 4790, 9580, 20879, 41758, 83516, 104395, 208790, 417580, 10001041, 20002082, 40004164, 50005205, 100010410, 200020820]

約数ペア:

[(1, 200020820), (2, 100010410), (4, 50005205), (5, 40004164), (10, 20002082), (20, 10001041), (479, 417580), (958, 208790), (1916, 104395), (2395, 83516), (4790, 41758), (9580, 20879)]