257981640

素因数分解:

$2^3\times 3^1\times 5^1\times 7^1\times {\mathrm{307121}}^1$

素因数の和:307142

約数の個数: 64

約数和(自身を含む): 884511360

約数和(自身を除く): 626529720

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 15, 20, 21, 24, 28, 30, 35, 40, 42, 56, 60, 70, 84, 105, 120, 140, 168, 210, 280, 420, 840, 307121, 614242, 921363, 1228484, 1535605, 1842726, 2149847, 2456968, 3071210, 3685452, 4299694, 4606815, 6142420, 6449541, 7370904, 8599388, 9213630, 10749235, 12284840, 12899082, 17198776, 18427260, 21498470, 25798164, 32247705, 36854520, 42996940, 51596328, 64495410, 85993880, 128990820, 257981640]

約数ペア:

[(1, 257981640), (2, 128990820), (3, 85993880), (4, 64495410), (5, 51596328), (6, 42996940), (7, 36854520), (8, 32247705), (10, 25798164), (12, 21498470), (14, 18427260), (15, 17198776), (20, 12899082), (21, 12284840), (24, 10749235), (28, 9213630), (30, 8599388), (35, 7370904), (40, 6449541), (42, 6142420), (56, 4606815), (60, 4299694), (70, 3685452), (84, 3071210), (105, 2456968), (120, 2149847), (140, 1842726), (168, 1535605), (210, 1228484), (280, 921363), (420, 614242), (840, 307121)]