21196959

素因数分解:

$3^1\times 7^2\times {\mathrm{41}}^1\times {\mathrm{3517}}^1$

素因数の和:3575

約数の個数: 24

約数和(自身を含む): 33688368

約数和(自身を除く): 12491409

約数列:

[1, 3, 7, 21, 41, 49, 123, 147, 287, 861, 2009, 3517, 6027, 10551, 24619, 73857, 144197, 172333, 432591, 516999, 1009379, 3028137, 7065653, 21196959]

約数ペア:

[(1, 21196959), (3, 7065653), (7, 3028137), (21, 1009379), (41, 516999), (49, 432591), (123, 172333), (147, 144197), (287, 73857), (861, 24619), (2009, 10551), (3517, 6027)]