21072009

素因数分解:

$3^1\times 7^2\times {\mathrm{29}}^1\times {\mathrm{4943}}^1$

素因数の和:4989

約数の個数: 24

約数和(自身を含む): 33816960

約数和(自身を除く): 12744951

約数列:

[1, 3, 7, 21, 29, 49, 87, 147, 203, 609, 1421, 4263, 4943, 14829, 34601, 103803, 143347, 242207, 430041, 726621, 1003429, 3010287, 7024003, 21072009]

約数ペア:

[(1, 21072009), (3, 7024003), (7, 3010287), (21, 1003429), (29, 726621), (49, 430041), (87, 242207), (147, 143347), (203, 103803), (609, 34601), (1421, 14829), (4263, 4943)]