21478431

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{107}}^1\times {\mathrm{5147}}^1$

素因数の和:5270

約数の個数: 16

約数和(自身を含む): 31135104

約数和(自身を除く): 9656673

約数列:

[1, 3, 13, 39, 107, 321, 1391, 4173, 5147, 15441, 66911, 200733, 550729, 1652187, 7159477, 21478431]

約数ペア:

[(1, 21478431), (3, 7159477), (13, 1652187), (39, 550729), (107, 200733), (321, 66911), (1391, 15441), (4173, 5147)]