28657216

素因数分解:

$2^6\times 7^1\times {\mathrm{47}}^1\times {\mathrm{1361}}^1$

素因数の和:1427

約数の個数: 56

約数和(自身を含む): 66422016

約数和(自身を除く): 37764800

約数列:

[1, 2, 4, 7, 8, 14, 16, 28, 32, 47, 56, 64, 94, 112, 188, 224, 329, 376, 448, 658, 752, 1316, 1361, 1504, 2632, 2722, 3008, 5264, 5444, 9527, 10528, 10888, 19054, 21056, 21776, 38108, 43552, 63967, 76216, 87104, 127934, 152432, 255868, 304864, 447769, 511736, 609728, 895538, 1023472, 1791076, 2046944, 3582152, 4093888, 7164304, 14328608, 28657216]

約数ペア:

[(1, 28657216), (2, 14328608), (4, 7164304), (7, 4093888), (8, 3582152), (14, 2046944), (16, 1791076), (28, 1023472), (32, 895538), (47, 609728), (56, 511736), (64, 447769), (94, 304864), (112, 255868), (188, 152432), (224, 127934), (329, 87104), (376, 76216), (448, 63967), (658, 43552), (752, 38108), (1316, 21776), (1361, 21056), (1504, 19054), (2632, 10888), (2722, 10528), (3008, 9527), (5264, 5444)]