20909133

素因数分解:

$3^2\times 7^2\times {\mathrm{17}}^1\times {\mathrm{2789}}^1$

素因数の和:2826

約数の個数: 36

約数和(自身を含む): 37213020

約数和(自身を除く): 16303887

約数列:

[1, 3, 7, 9, 17, 21, 49, 51, 63, 119, 147, 153, 357, 441, 833, 1071, 2499, 2789, 7497, 8367, 19523, 25101, 47413, 58569, 136661, 142239, 175707, 331891, 409983, 426717, 995673, 1229949, 2323237, 2987019, 6969711, 20909133]

約数ペア:

[(1, 20909133), (3, 6969711), (7, 2987019), (9, 2323237), (17, 1229949), (21, 995673), (49, 426717), (51, 409983), (63, 331891), (119, 175707), (147, 142239), (153, 136661), (357, 58569), (441, 47413), (833, 25101), (1071, 19523), (2499, 8367), (2789, 7497)]