2781520

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{4967}}^1$

素因数の和:4987

約数の個数: 40

約数和(自身を含む): 7392384

約数和(自身を除く): 4610864

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 56, 70, 80, 112, 140, 280, 560, 4967, 9934, 19868, 24835, 34769, 39736, 49670, 69538, 79472, 99340, 139076, 173845, 198680, 278152, 347690, 397360, 556304, 695380, 1390760, 2781520]

約数ペア:

[(1, 2781520), (2, 1390760), (4, 695380), (5, 556304), (7, 397360), (8, 347690), (10, 278152), (14, 198680), (16, 173845), (20, 139076), (28, 99340), (35, 79472), (40, 69538), (56, 49670), (70, 39736), (80, 34769), (112, 24835), (140, 19868), (280, 9934), (560, 4967)]