79872440

素因数分解:

$2^3\times 5^1\times {\mathrm{1009}}^1\times {\mathrm{1979}}^1$

素因数の和:2999

約数の個数: 32

約数和(自身を含む): 179982000

約数和(自身を除く): 100109560

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 1009, 1979, 2018, 3958, 4036, 5045, 7916, 8072, 9895, 10090, 15832, 19790, 20180, 39580, 40360, 79160, 1996811, 3993622, 7987244, 9984055, 15974488, 19968110, 39936220, 79872440]

約数ペア:

[(1, 79872440), (2, 39936220), (4, 19968110), (5, 15974488), (8, 9984055), (10, 7987244), (20, 3993622), (40, 1996811), (1009, 79160), (1979, 40360), (2018, 39580), (3958, 20180), (4036, 19790), (5045, 15832), (7916, 10090), (8072, 9895)]