16725681

素因数分解:

$3^2\times 7^1\times {\mathrm{19}}^1\times {\mathrm{89}}^1\times {\mathrm{157}}^1$

素因数の和:278

約数の個数: 48

約数和(自身を含む): 29577600

約数和(自身を除く): 12851919

約数列:

[1, 3, 7, 9, 19, 21, 57, 63, 89, 133, 157, 171, 267, 399, 471, 623, 801, 1099, 1197, 1413, 1691, 1869, 2983, 3297, 5073, 5607, 8949, 9891, 11837, 13973, 15219, 20881, 26847, 35511, 41919, 62643, 97811, 106533, 125757, 187929, 265487, 293433, 796461, 880299, 1858409, 2389383, 5575227, 16725681]

約数ペア:

[(1, 16725681), (3, 5575227), (7, 2389383), (9, 1858409), (19, 880299), (21, 796461), (57, 293433), (63, 265487), (89, 187929), (133, 125757), (157, 106533), (171, 97811), (267, 62643), (399, 41919), (471, 35511), (623, 26847), (801, 20881), (1099, 15219), (1197, 13973), (1413, 11837), (1691, 9891), (1869, 8949), (2983, 5607), (3297, 5073)]