21247545

素因数分解:

$3^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{131}}^1\times {\mathrm{983}}^1$

素因数の和:1133

約数の個数: 32

約数和(自身を含む): 37407744

約数和(自身を除く): 16160199

約数列:

[1, 3, 5, 11, 15, 33, 55, 131, 165, 393, 655, 983, 1441, 1965, 2949, 4323, 4915, 7205, 10813, 14745, 21615, 32439, 54065, 128773, 162195, 386319, 643865, 1416503, 1931595, 4249509, 7082515, 21247545]

約数ペア:

[(1, 21247545), (3, 7082515), (5, 4249509), (11, 1931595), (15, 1416503), (33, 643865), (55, 386319), (131, 162195), (165, 128773), (393, 54065), (655, 32439), (983, 21615), (1441, 14745), (1965, 10813), (2949, 7205), (4323, 4915)]