20746405

素因数分解:

$5^1\times {\mathrm{61}}^1\times {\mathrm{251}}^1\times {\mathrm{271}}^1$

素因数の和:588

約数の個数: 16

約数和(自身を含む): 25498368

約数和(自身を除く): 4751963

約数列:

[1, 5, 61, 251, 271, 305, 1255, 1355, 15311, 16531, 68021, 76555, 82655, 340105, 4149281, 20746405]

約数ペア:

[(1, 20746405), (5, 4149281), (61, 340105), (251, 82655), (271, 76555), (305, 68021), (1255, 16531), (1355, 15311)]