664820

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{2557}}^1$

素因数の和:2579

約数の個数: 24

約数和(自身を含む): 1504104

約数和(自身を除く): 839284

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 260, 2557, 5114, 10228, 12785, 25570, 33241, 51140, 66482, 132964, 166205, 332410, 664820]

約数ペア:

[(1, 664820), (2, 332410), (4, 166205), (5, 132964), (10, 66482), (13, 51140), (20, 33241), (26, 25570), (52, 12785), (65, 10228), (130, 5114), (260, 2557)]