20868981

素因数分解:

$3^1\times 7^1\times {\mathrm{23}}^1\times {\mathrm{43207}}^1$

素因数の和:43240

約数の個数: 16

約数和(自身を含む): 33183744

約数和(自身を除く): 12314763

約数列:

[1, 3, 7, 21, 23, 69, 161, 483, 43207, 129621, 302449, 907347, 993761, 2981283, 6956327, 20868981]

約数ペア:

[(1, 20868981), (3, 6956327), (7, 2981283), (21, 993761), (23, 907347), (69, 302449), (161, 129621), (483, 43207)]