20766879

素因数分解:

$3^2\times 7^1\times {\mathrm{37}}^1\times {\mathrm{59}}^1\times {\mathrm{151}}^1$

素因数の和:260

約数の個数: 48

約数和(自身を含む): 36042240

約数和(自身を除く): 15275361

約数列:

[1, 3, 7, 9, 21, 37, 59, 63, 111, 151, 177, 259, 333, 413, 453, 531, 777, 1057, 1239, 1359, 2183, 2331, 3171, 3717, 5587, 6549, 8909, 9513, 15281, 16761, 19647, 26727, 39109, 45843, 50283, 62363, 80181, 117327, 137529, 187089, 329633, 351981, 561267, 988899, 2307431, 2966697, 6922293, 20766879]

約数ペア:

[(1, 20766879), (3, 6922293), (7, 2966697), (9, 2307431), (21, 988899), (37, 561267), (59, 351981), (63, 329633), (111, 187089), (151, 137529), (177, 117327), (259, 80181), (333, 62363), (413, 50283), (453, 45843), (531, 39109), (777, 26727), (1057, 19647), (1239, 16761), (1359, 15281), (2183, 9513), (2331, 8909), (3171, 6549), (3717, 5587)]