21955240

素因数分解:

$2^3\times 5^1\times {\mathrm{263}}^1\times {\mathrm{2087}}^1$

素因数の和:2361

約数の個数: 32

約数和(自身を含む): 49610880

約数和(自身を除く): 27655640

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 263, 526, 1052, 1315, 2087, 2104, 2630, 4174, 5260, 8348, 10435, 10520, 16696, 20870, 41740, 83480, 548881, 1097762, 2195524, 2744405, 4391048, 5488810, 10977620, 21955240]

約数ペア:

[(1, 21955240), (2, 10977620), (4, 5488810), (5, 4391048), (8, 2744405), (10, 2195524), (20, 1097762), (40, 548881), (263, 83480), (526, 41740), (1052, 20870), (1315, 16696), (2087, 10520), (2104, 10435), (2630, 8348), (4174, 5260)]