19705840

素因数分解:

$2^4\times 5^1\times 7^2\times {\mathrm{11}}^1\times {\mathrm{457}}^1$

素因数の和:495

約数の個数: 120

約数和(自身を含む): 58268592

約数和(自身を除く): 38562752

約数列:

[1, 2, 4, 5, 7, 8, 10, 11, 14, 16, 20, 22, 28, 35, 40, 44, 49, 55, 56, 70, 77, 80, 88, 98, 110, 112, 140, 154, 176, 196, 220, 245, 280, 308, 385, 392, 440, 457, 490, 539, 560, 616, 770, 784, 880, 914, 980, 1078, 1232, 1540, 1828, 1960, 2156, 2285, 2695, 3080, 3199, 3656, 3920, 4312, 4570, 5027, 5390, 6160, 6398, 7312, 8624, 9140, 10054, 10780, 12796, 15995, 18280, 20108, 21560, 22393, 25135, 25592, 31990, 35189, 36560, 40216, 43120, 44786, 50270, 51184, 63980, 70378, 80432, 89572, 100540, 111965, 127960, 140756, 175945, 179144, 201080, 223930, 246323, 255920, 281512, 351890, 358288, 402160, 447860, 492646, 563024, 703780, 895720, 985292, 1231615, 1407560, 1791440, 1970584, 2463230, 2815120, 3941168, 4926460, 9852920, 19705840]

約数ペア:

[(1, 19705840), (2, 9852920), (4, 4926460), (5, 3941168), (7, 2815120), (8, 2463230), (10, 1970584), (11, 1791440), (14, 1407560), (16, 1231615), (20, 985292), (22, 895720), (28, 703780), (35, 563024), (40, 492646), (44, 447860), (49, 402160), (55, 358288), (56, 351890), (70, 281512), (77, 255920), (80, 246323), (88, 223930), (98, 201080), (110, 179144), (112, 175945), (140, 140756), (154, 127960), (176, 111965), (196, 100540), (220, 89572), (245, 80432), (280, 70378), (308, 63980), (385, 51184), (392, 50270), (440, 44786), (457, 43120), (490, 40216), (539, 36560), (560, 35189), (616, 31990), (770, 25592), (784, 25135), (880, 22393), (914, 21560), (980, 20108), (1078, 18280), (1232, 15995), (1540, 12796), (1828, 10780), (1960, 10054), (2156, 9140), (2285, 8624), (2695, 7312), (3080, 6398), (3199, 6160), (3656, 5390), (3920, 5027), (4312, 4570)]