21499905

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{83}}^1\times {\mathrm{2467}}^1$

素因数の和:2565

約数の個数: 32

約数和(自身を含む): 39803904

約数和(自身を除く): 18303999

約数列:

[1, 3, 5, 7, 15, 21, 35, 83, 105, 249, 415, 581, 1245, 1743, 2467, 2905, 7401, 8715, 12335, 17269, 37005, 51807, 86345, 204761, 259035, 614283, 1023805, 1433327, 3071415, 4299981, 7166635, 21499905]

約数ペア:

[(1, 21499905), (3, 7166635), (5, 4299981), (7, 3071415), (15, 1433327), (21, 1023805), (35, 614283), (83, 259035), (105, 204761), (249, 86345), (415, 51807), (581, 37005), (1245, 17269), (1743, 12335), (2467, 8715), (2905, 7401)]