31980880

素因数分解:

$2^4\times 5^1\times {\mathrm{399761}}^1$

素因数の和:399774

約数の個数: 20

約数和(自身を含む): 74355732

約数和(自身を除く): 42374852

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 399761, 799522, 1599044, 1998805, 3198088, 3997610, 6396176, 7995220, 15990440, 31980880]

約数ペア:

[(1, 31980880), (2, 15990440), (4, 7995220), (5, 6396176), (8, 3997610), (10, 3198088), (16, 1998805), (20, 1599044), (40, 799522), (80, 399761)]