255767440

素因数分解:

$2^4\times 5^1\times {\mathrm{43}}^1\times {\mathrm{149}}^1\times {\mathrm{499}}^1$

素因数の和:704

約数の個数: 80

約数和(自身を含む): 613800000

約数和(自身を除く): 358032560

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 43, 80, 86, 149, 172, 215, 298, 344, 430, 499, 596, 688, 745, 860, 998, 1192, 1490, 1720, 1996, 2384, 2495, 2980, 3440, 3992, 4990, 5960, 6407, 7984, 9980, 11920, 12814, 19960, 21457, 25628, 32035, 39920, 42914, 51256, 64070, 74351, 85828, 102512, 107285, 128140, 148702, 171656, 214570, 256280, 297404, 343312, 371755, 429140, 512560, 594808, 743510, 858280, 1189616, 1487020, 1716560, 2974040, 3197093, 5948080, 6394186, 12788372, 15985465, 25576744, 31970930, 51153488, 63941860, 127883720, 255767440]

約数ペア:

[(1, 255767440), (2, 127883720), (4, 63941860), (5, 51153488), (8, 31970930), (10, 25576744), (16, 15985465), (20, 12788372), (40, 6394186), (43, 5948080), (80, 3197093), (86, 2974040), (149, 1716560), (172, 1487020), (215, 1189616), (298, 858280), (344, 743510), (430, 594808), (499, 512560), (596, 429140), (688, 371755), (745, 343312), (860, 297404), (998, 256280), (1192, 214570), (1490, 171656), (1720, 148702), (1996, 128140), (2384, 107285), (2495, 102512), (2980, 85828), (3440, 74351), (3992, 64070), (4990, 51256), (5960, 42914), (6407, 39920), (7984, 32035), (9980, 25628), (11920, 21457), (12814, 19960)]