15780880

素因数分解:

$2^4\times 5^1\times {\mathrm{197261}}^1$

素因数の和:197274

約数の個数: 20

約数和(自身を含む): 36690732

約数和(自身を除く): 20909852

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 197261, 394522, 789044, 986305, 1578088, 1972610, 3156176, 3945220, 7890440, 15780880]

約数ペア:

[(1, 15780880), (2, 7890440), (4, 3945220), (5, 3156176), (8, 1972610), (10, 1578088), (16, 986305), (20, 789044), (40, 394522), (80, 197261)]