21218517

素因数分解:

$3^5\times {\mathrm{29}}^1\times {\mathrm{3011}}^1$

素因数の和:3055

約数の個数: 24

約数和(自身を含む): 32891040

約数和(自身を除く): 11672523

約数列:

[1, 3, 9, 27, 29, 81, 87, 243, 261, 783, 2349, 3011, 7047, 9033, 27099, 81297, 87319, 243891, 261957, 731673, 785871, 2357613, 7072839, 21218517]

約数ペア:

[(1, 21218517), (3, 7072839), (9, 2357613), (27, 785871), (29, 731673), (81, 261957), (87, 243891), (243, 87319), (261, 81297), (783, 27099), (2349, 9033), (3011, 7047)]