20797865

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{41}}^1\times {\mathrm{401}}^1$

素因数の和:481

約数の個数: 32

約数和(自身を含む): 29175552

約数和(自身を除く): 8377687

約数列:

[1, 5, 11, 23, 41, 55, 115, 205, 253, 401, 451, 943, 1265, 2005, 2255, 4411, 4715, 9223, 10373, 16441, 22055, 46115, 51865, 82205, 101453, 180851, 378143, 507265, 904255, 1890715, 4159573, 20797865]

約数ペア:

[(1, 20797865), (5, 4159573), (11, 1890715), (23, 904255), (41, 507265), (55, 378143), (115, 180851), (205, 101453), (253, 82205), (401, 51865), (451, 46115), (943, 22055), (1265, 16441), (2005, 10373), (2255, 9223), (4411, 4715)]