31980560

素因数分解:

$2^4\times 5^1\times {\mathrm{399757}}^1$

素因数の和:399770

約数の個数: 20

約数和(自身を含む): 74354988

約数和(自身を除く): 42374428

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 399757, 799514, 1599028, 1998785, 3198056, 3997570, 6396112, 7995140, 15990280, 31980560]

約数ペア:

[(1, 31980560), (2, 15990280), (4, 7995140), (5, 6396112), (8, 3997570), (10, 3198056), (16, 1998785), (20, 1599028), (40, 799514), (80, 399757)]