128220880

素因数分解:

$2^4\times 5^1\times {\mathrm{1602761}}^1$

素因数の和:1602774

約数の個数: 20

約数和(自身を含む): 298113732

約数和(自身を除く): 169892852

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 1602761, 3205522, 6411044, 8013805, 12822088, 16027610, 25644176, 32055220, 64110440, 128220880]

約数ペア:

[(1, 128220880), (2, 64110440), (4, 32055220), (5, 25644176), (8, 16027610), (10, 12822088), (16, 8013805), (20, 6411044), (40, 3205522), (80, 1602761)]