21237867

素因数分解:

$3^2\times 7^1\times {\mathrm{277}}^1\times {\mathrm{1217}}^1$

素因数の和:1507

約数の個数: 24

約数和(自身を含む): 35214816

約数和(自身を除く): 13976949

約数列:

[1, 3, 7, 9, 21, 63, 277, 831, 1217, 1939, 2493, 3651, 5817, 8519, 10953, 17451, 25557, 76671, 337109, 1011327, 2359763, 3033981, 7079289, 21237867]

約数ペア:

[(1, 21237867), (3, 7079289), (7, 3033981), (9, 2359763), (21, 1011327), (63, 337109), (277, 76671), (831, 25557), (1217, 17451), (1939, 10953), (2493, 8519), (3651, 5817)]