21381191

素因数分解:

${\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{43}}^1\times {\mathrm{1663}}^1$

素因数の和:1742

約数の個数: 16

約数和(自身を含む): 24600576

約数和(自身を除く): 3219385

約数列:

[1, 13, 23, 43, 299, 559, 989, 1663, 12857, 21619, 38249, 71509, 497237, 929617, 1644707, 21381191]

約数ペア:

[(1, 21381191), (13, 1644707), (23, 929617), (43, 497237), (299, 71509), (559, 38249), (989, 21619), (1663, 12857)]