256221

素因数分解:

$3^2\times 7^3\times {\mathrm{83}}^1$

素因数の和:110

約数の個数: 24

約数和(自身を含む): 436800

約数和(自身を除く): 180579

約数列:

[1, 3, 7, 9, 21, 49, 63, 83, 147, 249, 343, 441, 581, 747, 1029, 1743, 3087, 4067, 5229, 12201, 28469, 36603, 85407, 256221]

約数ペア:

[(1, 256221), (3, 85407), (7, 36603), (9, 28469), (21, 12201), (49, 5229), (63, 4067), (83, 3087), (147, 1743), (249, 1029), (343, 747), (441, 581)]