21980245

素因数分解:

$5^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{33053}}^1$

素因数の和:33084

約数の個数: 16

約数和(自身を含む): 31731840

約数和(自身を除く): 9751595

約数列:

[1, 5, 7, 19, 35, 95, 133, 665, 33053, 165265, 231371, 628007, 1156855, 3140035, 4396049, 21980245]

約数ペア:

[(1, 21980245), (5, 4396049), (7, 3140035), (19, 1156855), (35, 628007), (95, 231371), (133, 165265), (665, 33053)]