128460880

素因数分解:

$2^4\times 5^1\times {\mathrm{1605761}}^1$

素因数の和:1605774

約数の個数: 20

約数和(自身を含む): 298671732

約数和(自身を除く): 170210852

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 1605761, 3211522, 6423044, 8028805, 12846088, 16057610, 25692176, 32115220, 64230440, 128460880]

約数ペア:

[(1, 128460880), (2, 64230440), (4, 32115220), (5, 25692176), (8, 16057610), (10, 12846088), (16, 8028805), (20, 6423044), (40, 3211522), (80, 1605761)]