21257229

素因数分解:

$3^1\times 7^2\times {\mathrm{41}}^1\times {\mathrm{3527}}^1$

素因数の和:3585

約数の個数: 24

約数和(自身を含む): 33784128

約数和(自身を除く): 12526899

約数列:

[1, 3, 7, 21, 41, 49, 123, 147, 287, 861, 2009, 3527, 6027, 10581, 24689, 74067, 144607, 172823, 433821, 518469, 1012249, 3036747, 7085743, 21257229]

約数ペア:

[(1, 21257229), (3, 7085743), (7, 3036747), (21, 1012249), (41, 518469), (49, 433821), (123, 172823), (147, 144607), (287, 74067), (861, 24689), (2009, 10581), (3527, 6027)]