21071240

素因数分解:

$2^3\times 5^1\times {\mathrm{526781}}^1$

素因数の和:526792

約数の個数: 16

約数和(自身を含む): 47410380

約数和(自身を除く): 26339140

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 526781, 1053562, 2107124, 2633905, 4214248, 5267810, 10535620, 21071240]

約数ペア:

[(1, 21071240), (2, 10535620), (4, 5267810), (5, 4214248), (8, 2633905), (10, 2107124), (20, 1053562), (40, 526781)]