256217080

素因数分解:

$2^3\times 5^1\times 7^2\times {\mathrm{61}}^1\times {\mathrm{2143}}^1$

素因数の和:2229

約数の個数: 96

約数和(自身を含む): 681920640

約数和(自身を除く): 425703560

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 49, 56, 61, 70, 98, 122, 140, 196, 244, 245, 280, 305, 392, 427, 488, 490, 610, 854, 980, 1220, 1708, 1960, 2135, 2143, 2440, 2989, 3416, 4270, 4286, 5978, 8540, 8572, 10715, 11956, 14945, 15001, 17080, 17144, 21430, 23912, 29890, 30002, 42860, 59780, 60004, 75005, 85720, 105007, 119560, 120008, 130723, 150010, 210014, 261446, 300020, 420028, 522892, 525035, 600040, 653615, 840056, 915061, 1045784, 1050070, 1307230, 1830122, 2100140, 2614460, 3660244, 4200280, 4575305, 5228920, 6405427, 7320488, 9150610, 12810854, 18301220, 25621708, 32027135, 36602440, 51243416, 64054270, 128108540, 256217080]

約数ペア:

[(1, 256217080), (2, 128108540), (4, 64054270), (5, 51243416), (7, 36602440), (8, 32027135), (10, 25621708), (14, 18301220), (20, 12810854), (28, 9150610), (35, 7320488), (40, 6405427), (49, 5228920), (56, 4575305), (61, 4200280), (70, 3660244), (98, 2614460), (122, 2100140), (140, 1830122), (196, 1307230), (244, 1050070), (245, 1045784), (280, 915061), (305, 840056), (392, 653615), (427, 600040), (488, 525035), (490, 522892), (610, 420028), (854, 300020), (980, 261446), (1220, 210014), (1708, 150010), (1960, 130723), (2135, 120008), (2143, 119560), (2440, 105007), (2989, 85720), (3416, 75005), (4270, 60004), (4286, 59780), (5978, 42860), (8540, 30002), (8572, 29890), (10715, 23912), (11956, 21430), (14945, 17144), (15001, 17080)]