19817920

素因数分解:

$2^6\times 5^1\times {\mathrm{17}}^1\times {\mathrm{3643}}^1$

素因数の和:3677

約数の個数: 56

約数和(自身を含む): 49981104

約数和(自身を除く): 30163184

約数列:

[1, 2, 4, 5, 8, 10, 16, 17, 20, 32, 34, 40, 64, 68, 80, 85, 136, 160, 170, 272, 320, 340, 544, 680, 1088, 1360, 2720, 3643, 5440, 7286, 14572, 18215, 29144, 36430, 58288, 61931, 72860, 116576, 123862, 145720, 233152, 247724, 291440, 309655, 495448, 582880, 619310, 990896, 1165760, 1238620, 1981792, 2477240, 3963584, 4954480, 9908960, 19817920]

約数ペア:

[(1, 19817920), (2, 9908960), (4, 4954480), (5, 3963584), (8, 2477240), (10, 1981792), (16, 1238620), (17, 1165760), (20, 990896), (32, 619310), (34, 582880), (40, 495448), (64, 309655), (68, 291440), (80, 247724), (85, 233152), (136, 145720), (160, 123862), (170, 116576), (272, 72860), (320, 61931), (340, 58288), (544, 36430), (680, 29144), (1088, 18215), (1360, 14572), (2720, 7286), (3643, 5440)]