21787461

素因数分解:

$3^4\times {\mathrm{47}}^1\times {\mathrm{59}}^1\times {\mathrm{97}}^1$

素因数の和:215

約数の個数: 40

約数和(自身を含む): 34151040

約数和(自身を除く): 12363579

約数列:

[1, 3, 9, 27, 47, 59, 81, 97, 141, 177, 291, 423, 531, 873, 1269, 1593, 2619, 2773, 3807, 4559, 4779, 5723, 7857, 8319, 13677, 17169, 24957, 41031, 51507, 74871, 123093, 154521, 224613, 268981, 369279, 463563, 806943, 2420829, 7262487, 21787461]

約数ペア:

[(1, 21787461), (3, 7262487), (9, 2420829), (27, 806943), (47, 463563), (59, 369279), (81, 268981), (97, 224613), (141, 154521), (177, 123093), (291, 74871), (423, 51507), (531, 41031), (873, 24957), (1269, 17169), (1593, 13677), (2619, 8319), (2773, 7857), (3807, 5723), (4559, 4779)]