20581280

素因数分解:

$2^5\times 5^1\times {\mathrm{307}}^1\times {\mathrm{419}}^1$

素因数の和:741

約数の個数: 48

約数和(自身を含む): 48898080

約数和(自身を除く): 28316800

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 160, 307, 419, 614, 838, 1228, 1535, 1676, 2095, 2456, 3070, 3352, 4190, 4912, 6140, 6704, 8380, 9824, 12280, 13408, 16760, 24560, 33520, 49120, 67040, 128633, 257266, 514532, 643165, 1029064, 1286330, 2058128, 2572660, 4116256, 5145320, 10290640, 20581280]

約数ペア:

[(1, 20581280), (2, 10290640), (4, 5145320), (5, 4116256), (8, 2572660), (10, 2058128), (16, 1286330), (20, 1029064), (32, 643165), (40, 514532), (80, 257266), (160, 128633), (307, 67040), (419, 49120), (614, 33520), (838, 24560), (1228, 16760), (1535, 13408), (1676, 12280), (2095, 9824), (2456, 8380), (3070, 6704), (3352, 6140), (4190, 4912)]