19968900

素因数分解:

$2^2\times 3^1\times 5^2\times 7^1\times {\mathrm{37}}^1\times {\mathrm{257}}^1$

素因数の和:318

約数の個数: 144

約数和(自身を含む): 68078976

約数和(自身を除く): 48110076

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 25, 28, 30, 35, 37, 42, 50, 60, 70, 74, 75, 84, 100, 105, 111, 140, 148, 150, 175, 185, 210, 222, 257, 259, 300, 350, 370, 420, 444, 514, 518, 525, 555, 700, 740, 771, 777, 925, 1028, 1036, 1050, 1110, 1285, 1295, 1542, 1554, 1799, 1850, 2100, 2220, 2570, 2590, 2775, 3084, 3108, 3598, 3700, 3855, 3885, 5140, 5180, 5397, 5550, 6425, 6475, 7196, 7710, 7770, 8995, 9509, 10794, 11100, 12850, 12950, 15420, 15540, 17990, 19018, 19275, 19425, 21588, 25700, 25900, 26985, 28527, 35980, 38036, 38550, 38850, 44975, 47545, 53970, 57054, 66563, 77100, 77700, 89950, 95090, 107940, 114108, 133126, 134925, 142635, 179900, 190180, 199689, 237725, 266252, 269850, 285270, 332815, 399378, 475450, 539700, 570540, 665630, 713175, 798756, 950900, 998445, 1331260, 1426350, 1664075, 1996890, 2852700, 3328150, 3993780, 4992225, 6656300, 9984450, 19968900]

約数ペア:

[(1, 19968900), (2, 9984450), (3, 6656300), (4, 4992225), (5, 3993780), (6, 3328150), (7, 2852700), (10, 1996890), (12, 1664075), (14, 1426350), (15, 1331260), (20, 998445), (21, 950900), (25, 798756), (28, 713175), (30, 665630), (35, 570540), (37, 539700), (42, 475450), (50, 399378), (60, 332815), (70, 285270), (74, 269850), (75, 266252), (84, 237725), (100, 199689), (105, 190180), (111, 179900), (140, 142635), (148, 134925), (150, 133126), (175, 114108), (185, 107940), (210, 95090), (222, 89950), (257, 77700), (259, 77100), (300, 66563), (350, 57054), (370, 53970), (420, 47545), (444, 44975), (514, 38850), (518, 38550), (525, 38036), (555, 35980), (700, 28527), (740, 26985), (771, 25900), (777, 25700), (925, 21588), (1028, 19425), (1036, 19275), (1050, 19018), (1110, 17990), (1285, 15540), (1295, 15420), (1542, 12950), (1554, 12850), (1799, 11100), (1850, 10794), (2100, 9509), (2220, 8995), (2570, 7770), (2590, 7710), (2775, 7196), (3084, 6475), (3108, 6425), (3598, 5550), (3700, 5397), (3855, 5180), (3885, 5140)]