21194991

素因数分解:

$3^2\times {\mathrm{41}}^1\times {\mathrm{71}}^1\times {\mathrm{809}}^1$

素因数の和:927

約数の個数: 24

約数和(自身を含む): 31842720

約数和(自身を除く): 10647729

約数列:

[1, 3, 9, 41, 71, 123, 213, 369, 639, 809, 2427, 2911, 7281, 8733, 26199, 33169, 57439, 99507, 172317, 298521, 516951, 2354999, 7064997, 21194991]

約数ペア:

[(1, 21194991), (3, 7064997), (9, 2354999), (41, 516951), (71, 298521), (123, 172317), (213, 99507), (369, 57439), (639, 33169), (809, 26199), (2427, 8733), (2911, 7281)]