21992008

素因数分解:

$2^3\times {\mathrm{1321}}^1\times {\mathrm{2081}}^1$

素因数の和:3408

約数の個数: 16

約数和(自身を含む): 41286060

約数和(自身を除く): 19294052

約数列:

[1, 2, 4, 8, 1321, 2081, 2642, 4162, 5284, 8324, 10568, 16648, 2749001, 5498002, 10996004, 21992008]

約数ペア:

[(1, 21992008), (2, 10996004), (4, 5498002), (8, 2749001), (1321, 16648), (2081, 10568), (2642, 8324), (4162, 5284)]