20011771

素因数分解:

${\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{23}}^1\times {\mathrm{31}}^1\times {\mathrm{127}}^1$

素因数の和:211

約数の個数: 32

約数和(自身を含む): 24772608

約数和(自身を除く): 4760837

約数列:

[1, 13, 17, 23, 31, 127, 221, 299, 391, 403, 527, 713, 1651, 2159, 2921, 3937, 5083, 6851, 9269, 12121, 28067, 37973, 49657, 51181, 66929, 90551, 157573, 645541, 870077, 1177163, 1539367, 20011771]

約数ペア:

[(1, 20011771), (13, 1539367), (17, 1177163), (23, 870077), (31, 645541), (127, 157573), (221, 90551), (299, 66929), (391, 51181), (403, 49657), (527, 37973), (713, 28067), (1651, 12121), (2159, 9269), (2921, 6851), (3937, 5083)]