20738872

素因数分解:

$2^3\times 7^1\times {\mathrm{11}}^1\times {\mathrm{131}}^1\times {\mathrm{257}}^1$

素因数の和:412

約数の個数: 64

約数和(自身を含む): 49040640

約数和(自身を除く): 28301768

約数列:

[1, 2, 4, 7, 8, 11, 14, 22, 28, 44, 56, 77, 88, 131, 154, 257, 262, 308, 514, 524, 616, 917, 1028, 1048, 1441, 1799, 1834, 2056, 2827, 2882, 3598, 3668, 5654, 5764, 7196, 7336, 10087, 11308, 11528, 14392, 19789, 20174, 22616, 33667, 39578, 40348, 67334, 79156, 80696, 134668, 158312, 235669, 269336, 370337, 471338, 740674, 942676, 1481348, 1885352, 2592359, 2962696, 5184718, 10369436, 20738872]

約数ペア:

[(1, 20738872), (2, 10369436), (4, 5184718), (7, 2962696), (8, 2592359), (11, 1885352), (14, 1481348), (22, 942676), (28, 740674), (44, 471338), (56, 370337), (77, 269336), (88, 235669), (131, 158312), (154, 134668), (257, 80696), (262, 79156), (308, 67334), (514, 40348), (524, 39578), (616, 33667), (917, 22616), (1028, 20174), (1048, 19789), (1441, 14392), (1799, 11528), (1834, 11308), (2056, 10087), (2827, 7336), (2882, 7196), (3598, 5764), (3668, 5654)]