20971167

素因数分解:

$3^1\times 7^2\times {\mathrm{331}}^1\times {\mathrm{431}}^1$

素因数の和:779

約数の個数: 24

約数和(自身を含む): 32700672

約数和(自身を除く): 11729505

約数列:

[1, 3, 7, 21, 49, 147, 331, 431, 993, 1293, 2317, 3017, 6951, 9051, 16219, 21119, 48657, 63357, 142661, 427983, 998627, 2995881, 6990389, 20971167]

約数ペア:

[(1, 20971167), (3, 6990389), (7, 2995881), (21, 998627), (49, 427983), (147, 142661), (331, 63357), (431, 48657), (993, 21119), (1293, 16219), (2317, 9051), (3017, 6951)]