18778900

素因数分解:

$2^2\times 5^2\times 7^1\times {\mathrm{139}}^1\times {\mathrm{193}}^1$

素因数の和:353

約数の個数: 72

約数和(自身を含む): 47149760

約数和(自身を除く): 28370860

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 25, 28, 35, 50, 70, 100, 139, 140, 175, 193, 278, 350, 386, 556, 695, 700, 772, 965, 973, 1351, 1390, 1930, 1946, 2702, 2780, 3475, 3860, 3892, 4825, 4865, 5404, 6755, 6950, 9650, 9730, 13510, 13900, 19300, 19460, 24325, 26827, 27020, 33775, 48650, 53654, 67550, 97300, 107308, 134135, 135100, 187789, 268270, 375578, 536540, 670675, 751156, 938945, 1341350, 1877890, 2682700, 3755780, 4694725, 9389450, 18778900]

約数ペア:

[(1, 18778900), (2, 9389450), (4, 4694725), (5, 3755780), (7, 2682700), (10, 1877890), (14, 1341350), (20, 938945), (25, 751156), (28, 670675), (35, 536540), (50, 375578), (70, 268270), (100, 187789), (139, 135100), (140, 134135), (175, 107308), (193, 97300), (278, 67550), (350, 53654), (386, 48650), (556, 33775), (695, 27020), (700, 26827), (772, 24325), (965, 19460), (973, 19300), (1351, 13900), (1390, 13510), (1930, 9730), (1946, 9650), (2702, 6950), (2780, 6755), (3475, 5404), (3860, 4865), (3892, 4825)]