19800640

素因数分解:

$2^6\times 5^1\times {\mathrm{43}}^1\times {\mathrm{1439}}^1$

素因数の和:1499

約数の個数: 56

約数和(自身を含む): 48280320

約数和(自身を除く): 28479680

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 43, 64, 80, 86, 160, 172, 215, 320, 344, 430, 688, 860, 1376, 1439, 1720, 2752, 2878, 3440, 5756, 6880, 7195, 11512, 13760, 14390, 23024, 28780, 46048, 57560, 61877, 92096, 115120, 123754, 230240, 247508, 309385, 460480, 495016, 618770, 990032, 1237540, 1980064, 2475080, 3960128, 4950160, 9900320, 19800640]

約数ペア:

[(1, 19800640), (2, 9900320), (4, 4950160), (5, 3960128), (8, 2475080), (10, 1980064), (16, 1237540), (20, 990032), (32, 618770), (40, 495016), (43, 460480), (64, 309385), (80, 247508), (86, 230240), (160, 123754), (172, 115120), (215, 92096), (320, 61877), (344, 57560), (430, 46048), (688, 28780), (860, 23024), (1376, 14390), (1439, 13760), (1720, 11512), (2752, 7195), (2878, 6880), (3440, 5756)]