2556440

素因数分解:

$2^3\times 5^1\times {\mathrm{79}}^1\times {\mathrm{809}}^1$

素因数の和:899

約数の個数: 32

約数和(自身を含む): 5832000

約数和(自身を除く): 3275560

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 79, 158, 316, 395, 632, 790, 809, 1580, 1618, 3160, 3236, 4045, 6472, 8090, 16180, 32360, 63911, 127822, 255644, 319555, 511288, 639110, 1278220, 2556440]

約数ペア:

[(1, 2556440), (2, 1278220), (4, 639110), (5, 511288), (8, 319555), (10, 255644), (20, 127822), (40, 63911), (79, 32360), (158, 16180), (316, 8090), (395, 6472), (632, 4045), (790, 3236), (809, 3160), (1580, 1618)]