21897015

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{107}}^1\times {\mathrm{1949}}^1$

素因数の和:2071

約数の個数: 32

約数和(自身を含む): 40435200

約数和(自身を除く): 18538185

約数列:

[1, 3, 5, 7, 15, 21, 35, 105, 107, 321, 535, 749, 1605, 1949, 2247, 3745, 5847, 9745, 11235, 13643, 29235, 40929, 68215, 204645, 208543, 625629, 1042715, 1459801, 3128145, 4379403, 7299005, 21897015]

約数ペア:

[(1, 21897015), (3, 7299005), (5, 4379403), (7, 3128145), (15, 1459801), (21, 1042715), (35, 625629), (105, 208543), (107, 204645), (321, 68215), (535, 40929), (749, 29235), (1605, 13643), (1949, 11235), (2247, 9745), (3745, 5847)]