21513639

素因数分解:

$3^1\times 7^1\times {\mathrm{47}}^1\times {\mathrm{71}}^1\times {\mathrm{307}}^1$

素因数の和:435

約数の個数: 32

約数和(自身を含む): 34062336

約数和(自身を除く): 12548697

約数列:

[1, 3, 7, 21, 47, 71, 141, 213, 307, 329, 497, 921, 987, 1491, 2149, 3337, 6447, 10011, 14429, 21797, 23359, 43287, 65391, 70077, 101003, 152579, 303009, 457737, 1024459, 3073377, 7171213, 21513639]

約数ペア:

[(1, 21513639), (3, 7171213), (7, 3073377), (21, 1024459), (47, 457737), (71, 303009), (141, 152579), (213, 101003), (307, 70077), (329, 65391), (497, 43287), (921, 23359), (987, 21797), (1491, 14429), (2149, 10011), (3337, 6447)]