78643880

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{280871}}^1$

素因数の和:280889

約数の個数: 32

約数和(自身を含む): 202227840

約数和(自身を除く): 123583960

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 280, 280871, 561742, 1123484, 1404355, 1966097, 2246968, 2808710, 3932194, 5617420, 7864388, 9830485, 11234840, 15728776, 19660970, 39321940, 78643880]

約数ペア:

[(1, 78643880), (2, 39321940), (4, 19660970), (5, 15728776), (7, 11234840), (8, 9830485), (10, 7864388), (14, 5617420), (20, 3932194), (28, 2808710), (35, 2246968), (40, 1966097), (56, 1404355), (70, 1123484), (140, 561742), (280, 280871)]