21080956

素因数分解:

$2^2\times {\mathrm{13}}^1\times {\mathrm{19}}^2\times {\mathrm{1123}}^1$

素因数の和:1178

約数の個数: 36

約数和(自身を含む): 41967912

約数和(自身を除く): 20886956

約数列:

[1, 2, 4, 13, 19, 26, 38, 52, 76, 247, 361, 494, 722, 988, 1123, 1444, 2246, 4492, 4693, 9386, 14599, 18772, 21337, 29198, 42674, 58396, 85348, 277381, 405403, 554762, 810806, 1109524, 1621612, 5270239, 10540478, 21080956]

約数ペア:

[(1, 21080956), (2, 10540478), (4, 5270239), (13, 1621612), (19, 1109524), (26, 810806), (38, 554762), (52, 405403), (76, 277381), (247, 85348), (361, 58396), (494, 42674), (722, 29198), (988, 21337), (1123, 18772), (1444, 14599), (2246, 9386), (4492, 4693)]