18515385

素因数分解:

$3^5\times 5^1\times 7^2\times {\mathrm{311}}^1$

素因数の和:345

約数の個数: 72

約数和(自身を含む): 38840256

約数和(自身を除く): 20324871

約数列:

[1, 3, 5, 7, 9, 15, 21, 27, 35, 45, 49, 63, 81, 105, 135, 147, 189, 243, 245, 311, 315, 405, 441, 567, 735, 933, 945, 1215, 1323, 1555, 1701, 2177, 2205, 2799, 2835, 3969, 4665, 6531, 6615, 8397, 8505, 10885, 11907, 13995, 15239, 19593, 19845, 25191, 32655, 41985, 45717, 58779, 59535, 75573, 76195, 97965, 125955, 137151, 176337, 228585, 293895, 377865, 411453, 529011, 685755, 881685, 1234359, 2057265, 2645055, 3703077, 6171795, 18515385]

約数ペア:

[(1, 18515385), (3, 6171795), (5, 3703077), (7, 2645055), (9, 2057265), (15, 1234359), (21, 881685), (27, 685755), (35, 529011), (45, 411453), (49, 377865), (63, 293895), (81, 228585), (105, 176337), (135, 137151), (147, 125955), (189, 97965), (243, 76195), (245, 75573), (311, 59535), (315, 58779), (405, 45717), (441, 41985), (567, 32655), (735, 25191), (933, 19845), (945, 19593), (1215, 15239), (1323, 13995), (1555, 11907), (1701, 10885), (2177, 8505), (2205, 8397), (2799, 6615), (2835, 6531), (3969, 4665)]