21749247

素因数分解:

$3^2\times {\mathrm{13}}^1\times {\mathrm{211}}^1\times {\mathrm{881}}^1$

素因数の和:1111

約数の個数: 24

約数和(自身を含む): 34031088

約数和(自身を除く): 12281841

約数列:

[1, 3, 9, 13, 39, 117, 211, 633, 881, 1899, 2643, 2743, 7929, 8229, 11453, 24687, 34359, 103077, 185891, 557673, 1673019, 2416583, 7249749, 21749247]

約数ペア:

[(1, 21749247), (3, 7249749), (9, 2416583), (13, 1673019), (39, 557673), (117, 185891), (211, 103077), (633, 34359), (881, 24687), (1899, 11453), (2643, 8229), (2743, 7929)]