21205291228

素因数分解:

$2^2\times {\mathrm{11}}^1\times {\mathrm{67}}^1\times {\mathrm{139}}^1\times {\mathrm{51749}}^1$

素因数の和:51970

約数の個数: 48

約数和(自身を含む): 41383440000

約数和(自身を除く): 20178148772

約数列:

[1, 2, 4, 11, 22, 44, 67, 134, 139, 268, 278, 556, 737, 1474, 1529, 2948, 3058, 6116, 9313, 18626, 37252, 51749, 102443, 103498, 204886, 206996, 409772, 569239, 1138478, 2276956, 3467183, 6934366, 7193111, 13868732, 14386222, 28772444, 38139013, 76278026, 79124221, 152556052, 158248442, 316496884, 481938437, 963876874, 1927753748, 5301322807, 10602645614, 21205291228]

約数ペア:

[(1, 21205291228), (2, 10602645614), (4, 5301322807), (11, 1927753748), (22, 963876874), (44, 481938437), (67, 316496884), (134, 158248442), (139, 152556052), (268, 79124221), (278, 76278026), (556, 38139013), (737, 28772444), (1474, 14386222), (1529, 13868732), (2948, 7193111), (3058, 6934366), (6116, 3467183), (9313, 2276956), (18626, 1138478), (37252, 569239), (51749, 409772), (102443, 206996), (103498, 204886)]