21153811

素因数分解:

$7^1\times {\mathrm{31}}^1\times {\mathrm{71}}^1\times {\mathrm{1373}}^1$

素因数の和:1482

約数の個数: 16

約数和(自身を含む): 25325568

約数和(自身を除く): 4171757

約数列:

[1, 7, 31, 71, 217, 497, 1373, 2201, 9611, 15407, 42563, 97483, 297941, 682381, 3021973, 21153811]

約数ペア:

[(1, 21153811), (7, 3021973), (31, 682381), (71, 297941), (217, 97483), (497, 42563), (1373, 15407), (2201, 9611)]