1278220

素因数分解:

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

素因数の和:897

約数の個数: 24

約数和(自身を含む): 2721600

約数和(自身を除く): 1443380

約数列:

[1, 2, 4, 5, 10, 20, 79, 158, 316, 395, 790, 809, 1580, 1618, 3236, 4045, 8090, 16180, 63911, 127822, 255644, 319555, 639110, 1278220]

約数ペア:

[(1, 1278220), (2, 639110), (4, 319555), (5, 255644), (10, 127822), (20, 63911), (79, 16180), (158, 8090), (316, 4045), (395, 3236), (790, 1618), (809, 1580)]