21280402

素因数分解:

$2^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{37}}^1\times {\mathrm{2011}}^1$

素因数の和:2074

約数の個数: 32

約数和(自身を含む): 38533824

約数和(自身を除く): 17253422

約数列:

[1, 2, 11, 13, 22, 26, 37, 74, 143, 286, 407, 481, 814, 962, 2011, 4022, 5291, 10582, 22121, 26143, 44242, 52286, 74407, 148814, 287573, 575146, 818477, 967291, 1636954, 1934582, 10640201, 21280402]

約数ペア:

[(1, 21280402), (2, 10640201), (11, 1934582), (13, 1636954), (22, 967291), (26, 818477), (37, 575146), (74, 287573), (143, 148814), (286, 74407), (407, 52286), (481, 44242), (814, 26143), (962, 22121), (2011, 10582), (4022, 5291)]