21013971

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{43}}^1\times {\mathrm{59}}^1\times {\mathrm{251}}^1$

素因数の和:367

約数の個数: 32

約数和(自身を含む): 31933440

約数和(自身を除く): 10919469

約数列:

[1, 3, 11, 33, 43, 59, 129, 177, 251, 473, 649, 753, 1419, 1947, 2537, 2761, 7611, 8283, 10793, 14809, 27907, 32379, 44427, 83721, 118723, 162899, 356169, 488697, 636787, 1910361, 7004657, 21013971]

約数ペア:

[(1, 21013971), (3, 7004657), (11, 1910361), (33, 636787), (43, 488697), (59, 356169), (129, 162899), (177, 118723), (251, 83721), (473, 44427), (649, 32379), (753, 27907), (1419, 14809), (1947, 10793), (2537, 8283), (2761, 7611)]