16720221

素因数分解:

$3^1\times 7^3\times {\mathrm{16249}}^1$

素因数の和:16273

約数の個数: 16

約数和(自身を含む): 26000000

約数和(自身を除く): 9279779

約数列:

[1, 3, 7, 21, 49, 147, 343, 1029, 16249, 48747, 113743, 341229, 796201, 2388603, 5573407, 16720221]

約数ペア:

[(1, 16720221), (3, 5573407), (7, 2388603), (21, 796201), (49, 341229), (147, 113743), (343, 48747), (1029, 16249)]