18765513

素因数分解:

$3^4\times {\mathrm{13}}^1\times {\mathrm{71}}^1\times {\mathrm{251}}^1$

素因数の和:347

約数の個数: 40

約数和(自身を含む): 30735936

約数和(自身を除く): 11970423

約数列:

[1, 3, 9, 13, 27, 39, 71, 81, 117, 213, 251, 351, 639, 753, 923, 1053, 1917, 2259, 2769, 3263, 5751, 6777, 8307, 9789, 17821, 20331, 24921, 29367, 53463, 74763, 88101, 160389, 231673, 264303, 481167, 695019, 1443501, 2085057, 6255171, 18765513]

約数ペア:

[(1, 18765513), (3, 6255171), (9, 2085057), (13, 1443501), (27, 695019), (39, 481167), (71, 264303), (81, 231673), (117, 160389), (213, 88101), (251, 74763), (351, 53463), (639, 29367), (753, 24921), (923, 20331), (1053, 17821), (1917, 9789), (2259, 8307), (2769, 6777), (3263, 5751)]