1279240

素因数分解:

$2^3\times 5^1\times {\mathrm{31981}}^1$

素因数の和:31992

約数の個数: 16

約数和(自身を含む): 2878380

約数和(自身を除く): 1599140

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 31981, 63962, 127924, 159905, 255848, 319810, 639620, 1279240]

約数ペア:

[(1, 1279240), (2, 639620), (4, 319810), (5, 255848), (8, 159905), (10, 127924), (20, 63962), (40, 31981)]