64740880

素因数分解:

$2^4\times 5^1\times {\mathrm{809261}}^1$

素因数の和:809274

約数の個数: 20

約数和(自身を含む): 150522732

約数和(自身を除く): 85781852

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 809261, 1618522, 3237044, 4046305, 6474088, 8092610, 12948176, 16185220, 32370440, 64740880]

約数ペア:

[(1, 64740880), (2, 32370440), (4, 16185220), (5, 12948176), (8, 8092610), (10, 6474088), (16, 4046305), (20, 3237044), (40, 1618522), (80, 809261)]