21387249

素因数分解:

$3^2\times {\mathrm{13}}^1\times {\mathrm{53}}^1\times {\mathrm{3449}}^1$

素因数の和:3521

約数の個数: 24

約数和(自身を含む): 33906600

約数和(自身を除く): 12519351

約数列:

[1, 3, 9, 13, 39, 53, 117, 159, 477, 689, 2067, 3449, 6201, 10347, 31041, 44837, 134511, 182797, 403533, 548391, 1645173, 2376361, 7129083, 21387249]

約数ペア:

[(1, 21387249), (3, 7129083), (9, 2376361), (13, 1645173), (39, 548391), (53, 403533), (117, 182797), (159, 134511), (477, 44837), (689, 31041), (2067, 10347), (3449, 6201)]