21744207

素因数分解:

$3^4\times {\mathrm{17}}^1\times {\mathrm{15791}}^1$

素因数の和:15820

約数の個数: 20

約数和(自身を含む): 34394976

約数和(自身を除く): 12650769

約数列:

[1, 3, 9, 17, 27, 51, 81, 153, 459, 1377, 15791, 47373, 142119, 268447, 426357, 805341, 1279071, 2416023, 7248069, 21744207]

約数ペア:

[(1, 21744207), (3, 7248069), (9, 2416023), (17, 1279071), (27, 805341), (51, 426357), (81, 268447), (153, 142119), (459, 47373), (1377, 15791)]