19780348

素因数分解:

$2^2\times 7^1\times {\mathrm{37}}^1\times {\mathrm{61}}^1\times {\mathrm{313}}^1$

素因数の和:422

約数の個数: 48

約数和(自身を含む): 41427904

約数和(自身を除く): 21647556

約数列:

[1, 2, 4, 7, 14, 28, 37, 61, 74, 122, 148, 244, 259, 313, 427, 518, 626, 854, 1036, 1252, 1708, 2191, 2257, 4382, 4514, 8764, 9028, 11581, 15799, 19093, 23162, 31598, 38186, 46324, 63196, 76372, 81067, 133651, 162134, 267302, 324268, 534604, 706441, 1412882, 2825764, 4945087, 9890174, 19780348]

約数ペア:

[(1, 19780348), (2, 9890174), (4, 4945087), (7, 2825764), (14, 1412882), (28, 706441), (37, 534604), (61, 324268), (74, 267302), (122, 162134), (148, 133651), (244, 81067), (259, 76372), (313, 63196), (427, 46324), (518, 38186), (626, 31598), (854, 23162), (1036, 19093), (1252, 15799), (1708, 11581), (2191, 9028), (2257, 8764), (4382, 4514)]