21246855

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{11903}}^1$

素因数の和:11935

約数の個数: 32

約数和(自身を含む): 41140224

約数和(自身を除く): 19893369

約数列:

[1, 3, 5, 7, 15, 17, 21, 35, 51, 85, 105, 119, 255, 357, 595, 1785, 11903, 35709, 59515, 83321, 178545, 202351, 249963, 416605, 607053, 1011755, 1249815, 1416457, 3035265, 4249371, 7082285, 21246855]

約数ペア:

[(1, 21246855), (3, 7082285), (5, 4249371), (7, 3035265), (15, 1416457), (17, 1249815), (21, 1011755), (35, 607053), (51, 416605), (85, 249963), (105, 202351), (119, 178545), (255, 83321), (357, 59515), (595, 35709), (1785, 11903)]