20280656

素因数分解:

$2^4\times {\mathrm{11}}^1\times {\mathrm{139}}^1\times {\mathrm{829}}^1$

素因数の和:987

約数の個数: 40

約数和(自身を含む): 43226400

約数和(自身を除く): 22945744

約数列:

[1, 2, 4, 8, 11, 16, 22, 44, 88, 139, 176, 278, 556, 829, 1112, 1529, 1658, 2224, 3058, 3316, 6116, 6632, 9119, 12232, 13264, 18238, 24464, 36476, 72952, 115231, 145904, 230462, 460924, 921848, 1267541, 1843696, 2535082, 5070164, 10140328, 20280656]

約数ペア:

[(1, 20280656), (2, 10140328), (4, 5070164), (8, 2535082), (11, 1843696), (16, 1267541), (22, 921848), (44, 460924), (88, 230462), (139, 145904), (176, 115231), (278, 72952), (556, 36476), (829, 24464), (1112, 18238), (1529, 13264), (1658, 12232), (2224, 9119), (3058, 6632), (3316, 6116)]