2639240

素因数分解:

$2^3\times 5^1\times {\mathrm{65981}}^1$

素因数の和:65992

約数の個数: 16

約数和(自身を含む): 5938380

約数和(自身を除く): 3299140

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 65981, 131962, 263924, 329905, 527848, 659810, 1319620, 2639240]

約数ペア:

[(1, 2639240), (2, 1319620), (4, 659810), (5, 527848), (8, 329905), (10, 263924), (20, 131962), (40, 65981)]