31267431

素因数分解:

$3^3\times {\mathrm{13}}^1\times {\mathrm{229}}^1\times {\mathrm{389}}^1$

素因数の和:640

約数の個数: 32

約数和(自身を含む): 50232000

約数和(自身を除く): 18964569

約数列:

[1, 3, 9, 13, 27, 39, 117, 229, 351, 389, 687, 1167, 2061, 2977, 3501, 5057, 6183, 8931, 10503, 15171, 26793, 45513, 80379, 89081, 136539, 267243, 801729, 1158053, 2405187, 3474159, 10422477, 31267431]

約数ペア:

[(1, 31267431), (3, 10422477), (9, 3474159), (13, 2405187), (27, 1158053), (39, 801729), (117, 267243), (229, 136539), (351, 89081), (389, 80379), (687, 45513), (1167, 26793), (2061, 15171), (2977, 10503), (3501, 8931), (5057, 6183)]