20992385

素因数分解:

$5^1\times {\mathrm{43}}^1\times {\mathrm{251}}^1\times {\mathrm{389}}^1$

素因数の和:688

約数の個数: 16

約数和(自身を含む): 25945920

約数和(自身を除く): 4953535

約数列:

[1, 5, 43, 215, 251, 389, 1255, 1945, 10793, 16727, 53965, 83635, 97639, 488195, 4198477, 20992385]

約数ペア:

[(1, 20992385), (5, 4198477), (43, 488195), (215, 97639), (251, 83635), (389, 53965), (1255, 16727), (1945, 10793)]