21691855

素因数分解:

$5^1\times {\mathrm{29}}^1\times {\mathrm{211}}^1\times {\mathrm{709}}^1$

素因数の和:954

約数の個数: 16

約数和(自身を含む): 27093600

約数和(自身を除く): 5401745

約数列:

[1, 5, 29, 145, 211, 709, 1055, 3545, 6119, 20561, 30595, 102805, 149599, 747995, 4338371, 21691855]

約数ペア:

[(1, 21691855), (5, 4338371), (29, 747995), (145, 149599), (211, 102805), (709, 30595), (1055, 20561), (3545, 6119)]