19578020

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{12713}}^1$

素因数の和:12740

約数の個数: 48

約数和(自身を含む): 51262848

約数和(自身を除く): 31684828

約数列:

[1, 2, 4, 5, 7, 10, 11, 14, 20, 22, 28, 35, 44, 55, 70, 77, 110, 140, 154, 220, 308, 385, 770, 1540, 12713, 25426, 50852, 63565, 88991, 127130, 139843, 177982, 254260, 279686, 355964, 444955, 559372, 699215, 889910, 978901, 1398430, 1779820, 1957802, 2796860, 3915604, 4894505, 9789010, 19578020]

約数ペア:

[(1, 19578020), (2, 9789010), (4, 4894505), (5, 3915604), (7, 2796860), (10, 1957802), (11, 1779820), (14, 1398430), (20, 978901), (22, 889910), (28, 699215), (35, 559372), (44, 444955), (55, 355964), (70, 279686), (77, 254260), (110, 177982), (140, 139843), (154, 127130), (220, 88991), (308, 63565), (385, 50852), (770, 25426), (1540, 12713)]