21157281

素因数分解:

$3^5\times {\mathrm{83}}^1\times {\mathrm{1049}}^1$

素因数の和:1147

約数の個数: 24

約数和(自身を含む): 32104800

約数和(自身を除く): 10947519

約数列:

[1, 3, 9, 27, 81, 83, 243, 249, 747, 1049, 2241, 3147, 6723, 9441, 20169, 28323, 84969, 87067, 254907, 261201, 783603, 2350809, 7052427, 21157281]

約数ペア:

[(1, 21157281), (3, 7052427), (9, 2350809), (27, 783603), (81, 261201), (83, 254907), (243, 87067), (249, 84969), (747, 28323), (1049, 20169), (2241, 9441), (3147, 6723)]