20637183

素因数分解:

$3^1\times 7^2\times {\mathrm{29}}^1\times {\mathrm{47}}^1\times {\mathrm{103}}^1$

素因数の和:196

約数の個数: 48

約数和(自身を含む): 34145280

約数和(自身を除く): 13508097

約数列:

[1, 3, 7, 21, 29, 47, 49, 87, 103, 141, 147, 203, 309, 329, 609, 721, 987, 1363, 1421, 2163, 2303, 2987, 4089, 4263, 4841, 5047, 6909, 8961, 9541, 14523, 15141, 20909, 28623, 33887, 62727, 66787, 101661, 140389, 146363, 200361, 237209, 421167, 439089, 711627, 982723, 2948169, 6879061, 20637183]

約数ペア:

[(1, 20637183), (3, 6879061), (7, 2948169), (21, 982723), (29, 711627), (47, 439089), (49, 421167), (87, 237209), (103, 200361), (141, 146363), (147, 140389), (203, 101661), (309, 66787), (329, 62727), (609, 33887), (721, 28623), (987, 20909), (1363, 15141), (1421, 14523), (2163, 9541), (2303, 8961), (2987, 6909), (4089, 5047), (4263, 4841)]