78661640

素因数分解:

$2^3\times 5^1\times {\mathrm{1009}}^1\times {\mathrm{1949}}^1$

素因数の和:2969

約数の個数: 32

約数和(自身を含む): 177255000

約数和(自身を除く): 98593360

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 1009, 1949, 2018, 3898, 4036, 5045, 7796, 8072, 9745, 10090, 15592, 19490, 20180, 38980, 40360, 77960, 1966541, 3933082, 7866164, 9832705, 15732328, 19665410, 39330820, 78661640]

約数ペア:

[(1, 78661640), (2, 39330820), (4, 19665410), (5, 15732328), (8, 9832705), (10, 7866164), (20, 3933082), (40, 1966541), (1009, 77960), (1949, 40360), (2018, 38980), (3898, 20180), (4036, 19490), (5045, 15592), (7796, 10090), (8072, 9745)]