21871213

素因数分解:

$7^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{7753}}^1$

素因数の和:7804

約数の個数: 16

約数和(自身を含む): 27790336

約数和(自身を除く): 5919123

約数列:

[1, 7, 13, 31, 91, 217, 403, 2821, 7753, 54271, 100789, 240343, 705523, 1682401, 3124459, 21871213]

約数ペア:

[(1, 21871213), (7, 3124459), (13, 1682401), (31, 705523), (91, 240343), (217, 100789), (403, 54271), (2821, 7753)]