18715671

素因数分解:

$3^3\times {\mathrm{13}}^1\times {\mathrm{71}}^1\times {\mathrm{751}}^1$

素因数の和:844

約数の個数: 32

約数和(自身を含む): 30320640

約数和(自身を除く): 11604969

約数列:

[1, 3, 9, 13, 27, 39, 71, 117, 213, 351, 639, 751, 923, 1917, 2253, 2769, 6759, 8307, 9763, 20277, 24921, 29289, 53321, 87867, 159963, 263601, 479889, 693173, 1439667, 2079519, 6238557, 18715671]

約数ペア:

[(1, 18715671), (3, 6238557), (9, 2079519), (13, 1439667), (27, 693173), (39, 479889), (71, 263601), (117, 159963), (213, 87867), (351, 53321), (639, 29289), (751, 24921), (923, 20277), (1917, 9763), (2253, 8307), (2769, 6759)]