640926670

素因数分解:

$2^1\times 5^1\times {\mathrm{131}}^1\times {\mathrm{489257}}^1$

素因数の和:489395

約数の個数: 16

約数和(自身を含む): 1162477008

約数和(自身を除く): 521550338

約数列:

[1, 2, 5, 10, 131, 262, 655, 1310, 489257, 978514, 2446285, 4892570, 64092667, 128185334, 320463335, 640926670]

約数ペア:

[(1, 640926670), (2, 320463335), (5, 128185334), (10, 64092667), (131, 4892570), (262, 2446285), (655, 978514), (1310, 489257)]