21987945

素因数分解:

$3^2\times 5^1\times 7^1\times {\mathrm{29}}^2\times {\mathrm{83}}^1$

素因数の和:159

約数の個数: 72

約数和(自身を含む): 45654336

約数和(自身を除く): 23666391

約数列:

[1, 3, 5, 7, 9, 15, 21, 29, 35, 45, 63, 83, 87, 105, 145, 203, 249, 261, 315, 415, 435, 581, 609, 747, 841, 1015, 1245, 1305, 1743, 1827, 2407, 2523, 2905, 3045, 3735, 4205, 5229, 5887, 7221, 7569, 8715, 9135, 12035, 12615, 16849, 17661, 21663, 26145, 29435, 36105, 37845, 50547, 52983, 69803, 84245, 88305, 108315, 151641, 209409, 252735, 264915, 349015, 488621, 628227, 758205, 1047045, 1465863, 2443105, 3141135, 4397589, 7329315, 21987945]

約数ペア:

[(1, 21987945), (3, 7329315), (5, 4397589), (7, 3141135), (9, 2443105), (15, 1465863), (21, 1047045), (29, 758205), (35, 628227), (45, 488621), (63, 349015), (83, 264915), (87, 252735), (105, 209409), (145, 151641), (203, 108315), (249, 88305), (261, 84245), (315, 69803), (415, 52983), (435, 50547), (581, 37845), (609, 36105), (747, 29435), (841, 26145), (1015, 21663), (1245, 17661), (1305, 16849), (1743, 12615), (1827, 12035), (2407, 9135), (2523, 8715), (2905, 7569), (3045, 7221), (3735, 5887), (4205, 5229)]