31615720

素因数分解:

$2^3\times 5^1\times {\mathrm{809}}^1\times {\mathrm{977}}^1$

素因数の和:1797

約数の個数: 32

約数和(自身を含む): 71296200

約数和(自身を除く): 39680480

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 809, 977, 1618, 1954, 3236, 3908, 4045, 4885, 6472, 7816, 8090, 9770, 16180, 19540, 32360, 39080, 790393, 1580786, 3161572, 3951965, 6323144, 7903930, 15807860, 31615720]

約数ペア:

[(1, 31615720), (2, 15807860), (4, 7903930), (5, 6323144), (8, 3951965), (10, 3161572), (20, 1580786), (40, 790393), (809, 39080), (977, 32360), (1618, 19540), (1954, 16180), (3236, 9770), (3908, 8090), (4045, 7816), (4885, 6472)]