20865664

素因数分解:

$2^7\times {\mathrm{17}}^1\times {\mathrm{43}}^1\times {\mathrm{223}}^1$

素因数の和:297

約数の個数: 64

約数和(自身を含む): 45239040

約数和(自身を除く): 24373376

約数列:

[1, 2, 4, 8, 16, 17, 32, 34, 43, 64, 68, 86, 128, 136, 172, 223, 272, 344, 446, 544, 688, 731, 892, 1088, 1376, 1462, 1784, 2176, 2752, 2924, 3568, 3791, 5504, 5848, 7136, 7582, 9589, 11696, 14272, 15164, 19178, 23392, 28544, 30328, 38356, 46784, 60656, 76712, 93568, 121312, 153424, 163013, 242624, 306848, 326026, 485248, 613696, 652052, 1227392, 1304104, 2608208, 5216416, 10432832, 20865664]

約数ペア:

[(1, 20865664), (2, 10432832), (4, 5216416), (8, 2608208), (16, 1304104), (17, 1227392), (32, 652052), (34, 613696), (43, 485248), (64, 326026), (68, 306848), (86, 242624), (128, 163013), (136, 153424), (172, 121312), (223, 93568), (272, 76712), (344, 60656), (446, 46784), (544, 38356), (688, 30328), (731, 28544), (892, 23392), (1088, 19178), (1376, 15164), (1462, 14272), (1784, 11696), (2176, 9589), (2752, 7582), (2924, 7136), (3568, 5848), (3791, 5504)]