21640203

素因数分解:

$3^4\times {\mathrm{13}}^1\times {\mathrm{20551}}^1$

素因数の和:20576

約数の個数: 20

約数和(自身を含む): 34815088

約数和(自身を除く): 13174885

約数列:

[1, 3, 9, 13, 27, 39, 81, 117, 351, 1053, 20551, 61653, 184959, 267163, 554877, 801489, 1664631, 2404467, 7213401, 21640203]

約数ペア:

[(1, 21640203), (3, 7213401), (9, 2404467), (13, 1664631), (27, 801489), (39, 554877), (81, 267163), (117, 184959), (351, 61653), (1053, 20551)]