21975219

素因数分解:

$3^5\times 7^1\times {\mathrm{12919}}^1$

素因数の和:12941

約数の個数: 24

約数和(自身を含む): 37623040

約数和(自身を除く): 15647821

約数列:

[1, 3, 7, 9, 21, 27, 63, 81, 189, 243, 567, 1701, 12919, 38757, 90433, 116271, 271299, 348813, 813897, 1046439, 2441691, 3139317, 7325073, 21975219]

約数ペア:

[(1, 21975219), (3, 7325073), (7, 3139317), (9, 2441691), (21, 1046439), (27, 813897), (63, 348813), (81, 271299), (189, 116271), (243, 90433), (567, 38757), (1701, 12919)]