21809895

素因数分解:

$3^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{31}}^2\times {\mathrm{89}}^1$

素因数の和:176

約数の個数: 48

約数和(自身を含む): 38607840

約数和(自身を除く): 16797945

約数列:

[1, 3, 5, 15, 17, 31, 51, 85, 89, 93, 155, 255, 267, 445, 465, 527, 961, 1335, 1513, 1581, 2635, 2759, 2883, 4539, 4805, 7565, 7905, 8277, 13795, 14415, 16337, 22695, 41385, 46903, 49011, 81685, 85529, 140709, 234515, 245055, 256587, 427645, 703545, 1282935, 1453993, 4361979, 7269965, 21809895]

約数ペア:

[(1, 21809895), (3, 7269965), (5, 4361979), (15, 1453993), (17, 1282935), (31, 703545), (51, 427645), (85, 256587), (89, 245055), (93, 234515), (155, 140709), (255, 85529), (267, 81685), (445, 49011), (465, 46903), (527, 41385), (961, 22695), (1335, 16337), (1513, 14415), (1581, 13795), (2635, 8277), (2759, 7905), (2883, 7565), (4539, 4805)]