78991280

素因数分解:

$2^4\times 5^1\times {\mathrm{987391}}^1$

素因数の和:987404

約数の個数: 20

約数和(自身を含む): 183654912

約数和(自身を除く): 104663632

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 987391, 1974782, 3949564, 4936955, 7899128, 9873910, 15798256, 19747820, 39495640, 78991280]

約数ペア:

[(1, 78991280), (2, 39495640), (4, 19747820), (5, 15798256), (8, 9873910), (10, 7899128), (16, 4936955), (20, 3949564), (40, 1974782), (80, 987391)]