255351640

素因数分解:

$2^3\times 5^1\times {\mathrm{19}}^1\times {\mathrm{337}}^1\times {\mathrm{997}}^1$

素因数の和:1364

約数の個数: 64

約数和(自身を含む): 607183200

約数和(自身を除く): 351831560

約数列:

[1, 2, 4, 5, 8, 10, 19, 20, 38, 40, 76, 95, 152, 190, 337, 380, 674, 760, 997, 1348, 1685, 1994, 2696, 3370, 3988, 4985, 6403, 6740, 7976, 9970, 12806, 13480, 18943, 19940, 25612, 32015, 37886, 39880, 51224, 64030, 75772, 94715, 128060, 151544, 189430, 256120, 335989, 378860, 671978, 757720, 1343956, 1679945, 2687912, 3359890, 6383791, 6719780, 12767582, 13439560, 25535164, 31918955, 51070328, 63837910, 127675820, 255351640]

約数ペア:

[(1, 255351640), (2, 127675820), (4, 63837910), (5, 51070328), (8, 31918955), (10, 25535164), (19, 13439560), (20, 12767582), (38, 6719780), (40, 6383791), (76, 3359890), (95, 2687912), (152, 1679945), (190, 1343956), (337, 757720), (380, 671978), (674, 378860), (760, 335989), (997, 256120), (1348, 189430), (1685, 151544), (1994, 128060), (2696, 94715), (3370, 75772), (3988, 64030), (4985, 51224), (6403, 39880), (6740, 37886), (7976, 32015), (9970, 25612), (12806, 19940), (13480, 18943)]