21049604

素因数分解:

$2^2\times {\mathrm{17}}^2\times {\mathrm{131}}^1\times {\mathrm{139}}^1$

素因数の和:308

約数の個数: 36

約数和(自身を含む): 39713520

約数和(自身を除く): 18663916

約数列:

[1, 2, 4, 17, 34, 68, 131, 139, 262, 278, 289, 524, 556, 578, 1156, 2227, 2363, 4454, 4726, 8908, 9452, 18209, 36418, 37859, 40171, 72836, 75718, 80342, 151436, 160684, 309553, 619106, 1238212, 5262401, 10524802, 21049604]

約数ペア:

[(1, 21049604), (2, 10524802), (4, 5262401), (17, 1238212), (34, 619106), (68, 309553), (131, 160684), (139, 151436), (262, 80342), (278, 75718), (289, 72836), (524, 40171), (556, 37859), (578, 36418), (1156, 18209), (2227, 9452), (2363, 8908), (4454, 4726)]