21871240

素因数分解:

$2^3\times 5^1\times {\mathrm{546781}}^1$

素因数の和:546792

約数の個数: 16

約数和(自身を含む): 49210380

約数和(自身を除く): 27339140

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 546781, 1093562, 2187124, 2733905, 4374248, 5467810, 10935620, 21871240]

約数ペア:

[(1, 21871240), (2, 10935620), (4, 5467810), (5, 4374248), (8, 2733905), (10, 2187124), (20, 1093562), (40, 546781)]