81217280

素因数分解:

$2^8\times 5^1\times {\mathrm{107}}^1\times {\mathrm{593}}^1$

素因数の和:721

約数の個数: 72

約数和(自身を含む): 196690032

約数和(自身を除く): 115472752

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 107, 128, 160, 214, 256, 320, 428, 535, 593, 640, 856, 1070, 1186, 1280, 1712, 2140, 2372, 2965, 3424, 4280, 4744, 5930, 6848, 8560, 9488, 11860, 13696, 17120, 18976, 23720, 27392, 34240, 37952, 47440, 63451, 68480, 75904, 94880, 126902, 136960, 151808, 189760, 253804, 317255, 379520, 507608, 634510, 759040, 1015216, 1269020, 2030432, 2538040, 4060864, 5076080, 8121728, 10152160, 16243456, 20304320, 40608640, 81217280]

約数ペア:

[(1, 81217280), (2, 40608640), (4, 20304320), (5, 16243456), (8, 10152160), (10, 8121728), (16, 5076080), (20, 4060864), (32, 2538040), (40, 2030432), (64, 1269020), (80, 1015216), (107, 759040), (128, 634510), (160, 507608), (214, 379520), (256, 317255), (320, 253804), (428, 189760), (535, 151808), (593, 136960), (640, 126902), (856, 94880), (1070, 75904), (1186, 68480), (1280, 63451), (1712, 47440), (2140, 37952), (2372, 34240), (2965, 27392), (3424, 23720), (4280, 18976), (4744, 17120), (5930, 13696), (6848, 11860), (8560, 9488)]