20919595

素因数分解:

$5^1\times {\mathrm{79}}^1\times {\mathrm{211}}^1\times {\mathrm{251}}^1$

素因数の和:546

約数の個数: 16

約数和(自身を含む): 25643520

約数和(自身を除く): 4723925

約数列:

[1, 5, 79, 211, 251, 395, 1055, 1255, 16669, 19829, 52961, 83345, 99145, 264805, 4183919, 20919595]

約数ペア:

[(1, 20919595), (5, 4183919), (79, 264805), (211, 99145), (251, 83345), (395, 52961), (1055, 19829), (1255, 16669)]