21582981

素因数分解:

$3^2\times 7^2\times {\mathrm{109}}^1\times {\mathrm{449}}^1$

素因数の和:578

約数の個数: 36

約数和(自身を含む): 36679500

約数和(自身を除く): 15096519

約数列:

[1, 3, 7, 9, 21, 49, 63, 109, 147, 327, 441, 449, 763, 981, 1347, 2289, 3143, 4041, 5341, 6867, 9429, 16023, 22001, 28287, 48069, 48941, 66003, 146823, 198009, 342587, 440469, 1027761, 2398109, 3083283, 7194327, 21582981]

約数ペア:

[(1, 21582981), (3, 7194327), (7, 3083283), (9, 2398109), (21, 1027761), (49, 440469), (63, 342587), (109, 198009), (147, 146823), (327, 66003), (441, 48941), (449, 48069), (763, 28287), (981, 22001), (1347, 16023), (2289, 9429), (3143, 6867), (4041, 5341)]