129440

素因数分解:

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

素因数の和:824

約数の個数: 24

約数和(自身を含む): 306180

約数和(自身を除く): 176740

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 160, 809, 1618, 3236, 4045, 6472, 8090, 12944, 16180, 25888, 32360, 64720, 129440]

約数ペア:

[(1, 129440), (2, 64720), (4, 32360), (5, 25888), (8, 16180), (10, 12944), (16, 8090), (20, 6472), (32, 4045), (40, 3236), (80, 1618), (160, 809)]