20421219

素因数分解:

$3^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{31}}^1\times {\mathrm{127}}^1$

素因数の和:200

約数の個数: 64

約数和(自身を含む): 36700160

約数和(自身を除く): 16278941

約数列:

[1, 3, 7, 13, 19, 21, 31, 39, 57, 91, 93, 127, 133, 217, 247, 273, 381, 399, 403, 589, 651, 741, 889, 1209, 1651, 1729, 1767, 2413, 2667, 2821, 3937, 4123, 4953, 5187, 7239, 7657, 8463, 11557, 11811, 12369, 16891, 22971, 27559, 31369, 34671, 50673, 51181, 53599, 74803, 82677, 94107, 153543, 160797, 219583, 224409, 358267, 523621, 658749, 972439, 1074801, 1570863, 2917317, 6807073, 20421219]

約数ペア:

[(1, 20421219), (3, 6807073), (7, 2917317), (13, 1570863), (19, 1074801), (21, 972439), (31, 658749), (39, 523621), (57, 358267), (91, 224409), (93, 219583), (127, 160797), (133, 153543), (217, 94107), (247, 82677), (273, 74803), (381, 53599), (399, 51181), (403, 50673), (589, 34671), (651, 31369), (741, 27559), (889, 22971), (1209, 16891), (1651, 12369), (1729, 11811), (1767, 11557), (2413, 8463), (2667, 7657), (2821, 7239), (3937, 5187), (4123, 4953)]