21267939

素因数分解:

$3^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{4003}}^1$

素因数の和:4047

約数の個数: 32

約数和(自身を含む): 36900864

約数和(自身を除く): 15632925

約数列:

[1, 3, 7, 11, 21, 23, 33, 69, 77, 161, 231, 253, 483, 759, 1771, 4003, 5313, 12009, 28021, 44033, 84063, 92069, 132099, 276207, 308231, 644483, 924693, 1012759, 1933449, 3038277, 7089313, 21267939]

約数ペア:

[(1, 21267939), (3, 7089313), (7, 3038277), (11, 1933449), (21, 1012759), (23, 924693), (33, 644483), (69, 308231), (77, 276207), (161, 132099), (231, 92069), (253, 84063), (483, 44033), (759, 28021), (1771, 12009), (4003, 5313)]