21641865

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{71}}^1\times {\mathrm{2903}}^1$

素因数の和:2989

約数の個数: 32

約数和(自身を含む): 40144896

約数和(自身を除く): 18503031

約数列:

[1, 3, 5, 7, 15, 21, 35, 71, 105, 213, 355, 497, 1065, 1491, 2485, 2903, 7455, 8709, 14515, 20321, 43545, 60963, 101605, 206113, 304815, 618339, 1030565, 1442791, 3091695, 4328373, 7213955, 21641865]

約数ペア:

[(1, 21641865), (3, 7213955), (5, 4328373), (7, 3091695), (15, 1442791), (21, 1030565), (35, 618339), (71, 304815), (105, 206113), (213, 101605), (355, 60963), (497, 43545), (1065, 20321), (1491, 14515), (2485, 8709), (2903, 7455)]