20397824

素因数分解:

$2^8\times {\mathrm{17}}^1\times {\mathrm{43}}^1\times {\mathrm{109}}^1$

素因数の和:185

約数の個数: 72

約数和(自身を含む): 44518320

約数和(自身を除く): 24120496

約数列:

[1, 2, 4, 8, 16, 17, 32, 34, 43, 64, 68, 86, 109, 128, 136, 172, 218, 256, 272, 344, 436, 544, 688, 731, 872, 1088, 1376, 1462, 1744, 1853, 2176, 2752, 2924, 3488, 3706, 4352, 4687, 5504, 5848, 6976, 7412, 9374, 11008, 11696, 13952, 14824, 18748, 23392, 27904, 29648, 37496, 46784, 59296, 74992, 79679, 93568, 118592, 149984, 159358, 187136, 237184, 299968, 318716, 474368, 599936, 637432, 1199872, 1274864, 2549728, 5099456, 10198912, 20397824]

約数ペア:

[(1, 20397824), (2, 10198912), (4, 5099456), (8, 2549728), (16, 1274864), (17, 1199872), (32, 637432), (34, 599936), (43, 474368), (64, 318716), (68, 299968), (86, 237184), (109, 187136), (128, 159358), (136, 149984), (172, 118592), (218, 93568), (256, 79679), (272, 74992), (344, 59296), (436, 46784), (544, 37496), (688, 29648), (731, 27904), (872, 23392), (1088, 18748), (1376, 14824), (1462, 13952), (1744, 11696), (1853, 11008), (2176, 9374), (2752, 7412), (2924, 6976), (3488, 5848), (3706, 5504), (4352, 4687)]