128656

素因数分解:

$2^4\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{43}}^1$

素因数の和:79

約数の個数: 40

約数和(自身を含む): 294624

約数和(自身を除く): 165968

約数列:

[1, 2, 4, 8, 11, 16, 17, 22, 34, 43, 44, 68, 86, 88, 136, 172, 176, 187, 272, 344, 374, 473, 688, 731, 748, 946, 1462, 1496, 1892, 2924, 2992, 3784, 5848, 7568, 8041, 11696, 16082, 32164, 64328, 128656]

約数ペア:

[(1, 128656), (2, 64328), (4, 32164), (8, 16082), (11, 11696), (16, 8041), (17, 7568), (22, 5848), (34, 3784), (43, 2992), (44, 2924), (68, 1892), (86, 1496), (88, 1462), (136, 946), (172, 748), (176, 731), (187, 688), (272, 473), (344, 374)]