21407267

素因数分解:

$7^2\times {\mathrm{17}}^1\times {\mathrm{31}}^1\times {\mathrm{829}}^1$

素因数の和:891

約数の個数: 24

約数和(自身を含む): 27250560

約数和(自身を除く): 5843293

約数列:

[1, 7, 17, 31, 49, 119, 217, 527, 829, 833, 1519, 3689, 5803, 14093, 25699, 25823, 40621, 98651, 179893, 436883, 690557, 1259251, 3058181, 21407267]

約数ペア:

[(1, 21407267), (7, 3058181), (17, 1259251), (31, 690557), (49, 436883), (119, 179893), (217, 98651), (527, 40621), (829, 25823), (833, 25699), (1519, 14093), (3689, 5803)]