21551589

素因数分解:

$3^4\times {\mathrm{109}}^1\times {\mathrm{2441}}^1$

素因数の和:2562

約数の個数: 20

約数和(自身を含む): 32503020

約数和(自身を除く): 10951431

約数列:

[1, 3, 9, 27, 81, 109, 327, 981, 2441, 2943, 7323, 8829, 21969, 65907, 197721, 266069, 798207, 2394621, 7183863, 21551589]

約数ペア:

[(1, 21551589), (3, 7183863), (9, 2394621), (27, 798207), (81, 266069), (109, 197721), (327, 65907), (981, 21969), (2441, 8829), (2943, 7323)]