31128880

素因数分解:

$2^4\times 5^1\times {\mathrm{389111}}^1$

素因数の和:389124

約数の個数: 20

約数和(自身を含む): 72374832

約数和(自身を除く): 41245952

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 389111, 778222, 1556444, 1945555, 3112888, 3891110, 6225776, 7782220, 15564440, 31128880]

約数ペア:

[(1, 31128880), (2, 15564440), (4, 7782220), (5, 6225776), (8, 3891110), (10, 3112888), (16, 1945555), (20, 1556444), (40, 778222), (80, 389111)]