20981639

素因数分解:

$7^1\times {\mathrm{59}}^1\times {\mathrm{101}}^1\times {\mathrm{503}}^1$

素因数の和:670

約数の個数: 16

約数和(自身を含む): 24675840

約数和(自身を除く): 3694201

約数列:

[1, 7, 59, 101, 413, 503, 707, 3521, 5959, 29677, 41713, 50803, 207739, 355621, 2997377, 20981639]

約数ペア:

[(1, 20981639), (7, 2997377), (59, 355621), (101, 207739), (413, 50803), (503, 41713), (707, 29677), (3521, 5959)]