21520604

素因数分解:

$2^2\times 7^2\times {\mathrm{59}}^1\times {\mathrm{1861}}^1$

素因数の和:1938

約数の個数: 36

約数和(自身を含む): 44576280

約数和(自身を除く): 23055676

約数列:

[1, 2, 4, 7, 14, 28, 49, 59, 98, 118, 196, 236, 413, 826, 1652, 1861, 2891, 3722, 5782, 7444, 11564, 13027, 26054, 52108, 91189, 109799, 182378, 219598, 364756, 439196, 768593, 1537186, 3074372, 5380151, 10760302, 21520604]

約数ペア:

[(1, 21520604), (2, 10760302), (4, 5380151), (7, 3074372), (14, 1537186), (28, 768593), (49, 439196), (59, 364756), (98, 219598), (118, 182378), (196, 109799), (236, 91189), (413, 52108), (826, 26054), (1652, 13027), (1861, 11564), (2891, 7444), (3722, 5782)]