21184580

素因数分解:

$2^2\times 5^1\times {\mathrm{509}}^1\times {\mathrm{2081}}^1$

素因数の和:2599

約数の個数: 24

約数和(自身を含む): 44596440

約数和(自身を除く): 23411860

約数列:

[1, 2, 4, 5, 10, 20, 509, 1018, 2036, 2081, 2545, 4162, 5090, 8324, 10180, 10405, 20810, 41620, 1059229, 2118458, 4236916, 5296145, 10592290, 21184580]

約数ペア:

[(1, 21184580), (2, 10592290), (4, 5296145), (5, 4236916), (10, 2118458), (20, 1059229), (509, 41620), (1018, 20810), (2036, 10405), (2081, 10180), (2545, 8324), (4162, 5090)]