664764560

素因数分解:

$2^4\times 5^1\times {\mathrm{8309557}}^1$

素因数の和:8309570

約数の個数: 20

約数和(自身を含む): 1545577788

約数和(自身を除く): 880813228

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 8309557, 16619114, 33238228, 41547785, 66476456, 83095570, 132952912, 166191140, 332382280, 664764560]

約数ペア:

[(1, 664764560), (2, 332382280), (4, 166191140), (5, 132952912), (8, 83095570), (10, 66476456), (16, 41547785), (20, 33238228), (40, 16619114), (80, 8309557)]