21509033

素因数分解:

$7^1\times {\mathrm{13}}^1\times {\mathrm{47}}^2\times {\mathrm{107}}^1$

素因数の和:221

約数の個数: 24

約数和(自身を含む): 27300672

約数和(自身を除く): 5791639

約数列:

[1, 7, 13, 47, 91, 107, 329, 611, 749, 1391, 2209, 4277, 5029, 9737, 15463, 28717, 35203, 65377, 201019, 236363, 457639, 1654541, 3072719, 21509033]

約数ペア:

[(1, 21509033), (7, 3072719), (13, 1654541), (47, 457639), (91, 236363), (107, 201019), (329, 65377), (611, 35203), (749, 28717), (1391, 15463), (2209, 9737), (4277, 5029)]