20520717

素因数分解:

$3^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{47}}^1\times {\mathrm{1223}}^1$

素因数の和:1297

約数の個数: 32

約数和(自身を含む): 33841152

約数和(自身を除く): 13320435

約数列:

[1, 3, 7, 17, 21, 47, 51, 119, 141, 329, 357, 799, 987, 1223, 2397, 3669, 5593, 8561, 16779, 20791, 25683, 57481, 62373, 145537, 172443, 402367, 436611, 977177, 1207101, 2931531, 6840239, 20520717]

約数ペア:

[(1, 20520717), (3, 6840239), (7, 2931531), (17, 1207101), (21, 977177), (47, 436611), (51, 402367), (119, 172443), (141, 145537), (329, 62373), (357, 57481), (799, 25683), (987, 20791), (1223, 16779), (2397, 8561), (3669, 5593)]