78840980

素因数分解:

$2^2\times 5^1\times {\mathrm{191}}^1\times {\mathrm{20639}}^1$

素因数の和:20839

約数の個数: 24

約数和(自身を含む): 166440960

約数和(自身を除く): 87599980

約数列:

[1, 2, 4, 5, 10, 20, 191, 382, 764, 955, 1910, 3820, 20639, 41278, 82556, 103195, 206390, 412780, 3942049, 7884098, 15768196, 19710245, 39420490, 78840980]

約数ペア:

[(1, 78840980), (2, 39420490), (4, 19710245), (5, 15768196), (10, 7884098), (20, 3942049), (191, 412780), (382, 206390), (764, 103195), (955, 82556), (1910, 41278), (3820, 20639)]