18979840

素因数分解:

$2^{10}\times 5^1\times {\mathrm{11}}^1\times {\mathrm{337}}^1$

素因数の和:373

約数の個数: 88

約数和(自身を含む): 49815792

約数和(自身を除く): 30835952

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 32, 40, 44, 55, 64, 80, 88, 110, 128, 160, 176, 220, 256, 320, 337, 352, 440, 512, 640, 674, 704, 880, 1024, 1280, 1348, 1408, 1685, 1760, 2560, 2696, 2816, 3370, 3520, 3707, 5120, 5392, 5632, 6740, 7040, 7414, 10784, 11264, 13480, 14080, 14828, 18535, 21568, 26960, 28160, 29656, 37070, 43136, 53920, 56320, 59312, 74140, 86272, 107840, 118624, 148280, 172544, 215680, 237248, 296560, 345088, 431360, 474496, 593120, 862720, 948992, 1186240, 1725440, 1897984, 2372480, 3795968, 4744960, 9489920, 18979840]

約数ペア:

[(1, 18979840), (2, 9489920), (4, 4744960), (5, 3795968), (8, 2372480), (10, 1897984), (11, 1725440), (16, 1186240), (20, 948992), (22, 862720), (32, 593120), (40, 474496), (44, 431360), (55, 345088), (64, 296560), (80, 237248), (88, 215680), (110, 172544), (128, 148280), (160, 118624), (176, 107840), (220, 86272), (256, 74140), (320, 59312), (337, 56320), (352, 53920), (440, 43136), (512, 37070), (640, 29656), (674, 28160), (704, 26960), (880, 21568), (1024, 18535), (1280, 14828), (1348, 14080), (1408, 13480), (1685, 11264), (1760, 10784), (2560, 7414), (2696, 7040), (2816, 6740), (3370, 5632), (3520, 5392), (3707, 5120)]