21563765

素因数分解:

$5^1\times {\mathrm{19}}^1\times {\mathrm{23}}^1\times {\mathrm{71}}^1\times {\mathrm{139}}^1$

素因数の和:257

約数の個数: 32

約数和(自身を含む): 29030400

約数和(自身を除く): 7466635

約数列:

[1, 5, 19, 23, 71, 95, 115, 139, 355, 437, 695, 1349, 1633, 2185, 2641, 3197, 6745, 8165, 9869, 13205, 15985, 31027, 49345, 60743, 155135, 187511, 226987, 303715, 937555, 1134935, 4312753, 21563765]

約数ペア:

[(1, 21563765), (5, 4312753), (19, 1134935), (23, 937555), (71, 303715), (95, 226987), (115, 187511), (139, 155135), (355, 60743), (437, 49345), (695, 31027), (1349, 15985), (1633, 13205), (2185, 9869), (2641, 8165), (3197, 6745)]