21022821

素因数分解:

$3^4\times {\mathrm{53}}^1\times {\mathrm{59}}^1\times {\mathrm{83}}^1$

素因数の和:207

約数の個数: 40

約数和(自身を含む): 32931360

約数和(自身を除く): 11908539

約数列:

[1, 3, 9, 27, 53, 59, 81, 83, 159, 177, 249, 477, 531, 747, 1431, 1593, 2241, 3127, 4293, 4399, 4779, 4897, 6723, 9381, 13197, 14691, 28143, 39591, 44073, 84429, 118773, 132219, 253287, 259541, 356319, 396657, 778623, 2335869, 7007607, 21022821]

約数ペア:

[(1, 21022821), (3, 7007607), (9, 2335869), (27, 778623), (53, 396657), (59, 356319), (81, 259541), (83, 253287), (159, 132219), (177, 118773), (249, 84429), (477, 44073), (531, 39591), (747, 28143), (1431, 14691), (1593, 13197), (2241, 9381), (3127, 6723), (4293, 4897), (4399, 4779)]