21269620

素因数分解:

$2^2\times 5^1\times {\mathrm{947}}^1\times {\mathrm{1123}}^1$

素因数の和:2079

約数の個数: 24

約数和(自身を含む): 44753184

約数和(自身を除く): 23483564

約数列:

[1, 2, 4, 5, 10, 20, 947, 1123, 1894, 2246, 3788, 4492, 4735, 5615, 9470, 11230, 18940, 22460, 1063481, 2126962, 4253924, 5317405, 10634810, 21269620]

約数ペア:

[(1, 21269620), (2, 10634810), (4, 5317405), (5, 4253924), (10, 2126962), (20, 1063481), (947, 22460), (1123, 18940), (1894, 11230), (2246, 9470), (3788, 5615), (4492, 4735)]