78810440

素因数分解:

$2^3\times 5^1\times {\mathrm{1970261}}^1$

素因数の和:1970272

約数の個数: 16

約数和(自身を含む): 177323580

約数和(自身を除く): 98513140

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 1970261, 3940522, 7881044, 9851305, 15762088, 19702610, 39405220, 78810440]

約数ペア:

[(1, 78810440), (2, 39405220), (4, 19702610), (5, 15762088), (8, 9851305), (10, 7881044), (20, 3940522), (40, 1970261)]