20720535

素因数分解:

$3^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{83}}^1\times {\mathrm{89}}^1$

素因数の和:208

約数の個数: 64

約数和(自身を含む): 39191040

約数和(自身を除く): 18470505

約数列:

[1, 3, 5, 11, 15, 17, 33, 51, 55, 83, 85, 89, 165, 187, 249, 255, 267, 415, 445, 561, 913, 935, 979, 1245, 1335, 1411, 1513, 2739, 2805, 2937, 4233, 4539, 4565, 4895, 7055, 7387, 7565, 13695, 14685, 15521, 16643, 21165, 22161, 22695, 36935, 46563, 49929, 77605, 81257, 83215, 110805, 125579, 232815, 243771, 249645, 376737, 406285, 627895, 1218855, 1381369, 1883685, 4144107, 6906845, 20720535]

約数ペア:

[(1, 20720535), (3, 6906845), (5, 4144107), (11, 1883685), (15, 1381369), (17, 1218855), (33, 627895), (51, 406285), (55, 376737), (83, 249645), (85, 243771), (89, 232815), (165, 125579), (187, 110805), (249, 83215), (255, 81257), (267, 77605), (415, 49929), (445, 46563), (561, 36935), (913, 22695), (935, 22161), (979, 21165), (1245, 16643), (1335, 15521), (1411, 14685), (1513, 13695), (2739, 7565), (2805, 7387), (2937, 7055), (4233, 4895), (4539, 4565)]