257788139

素因数分解:

$7^1\times {\mathrm{37}}^1\times {\mathrm{43}}^1\times {\mathrm{79}}^1\times {\mathrm{293}}^1$

素因数の和:459

約数の個数: 32

約数和(自身を含む): 314603520

約数和(自身を除く): 56815381

約数列:

[1, 7, 37, 43, 79, 259, 293, 301, 553, 1591, 2051, 2923, 3397, 10841, 11137, 12599, 20461, 23147, 23779, 75887, 88193, 125689, 162029, 466163, 856439, 879823, 995321, 3263141, 5995073, 6967247, 36826877, 257788139]

約数ペア:

[(1, 257788139), (7, 36826877), (37, 6967247), (43, 5995073), (79, 3263141), (259, 995321), (293, 879823), (301, 856439), (553, 466163), (1591, 162029), (2051, 125689), (2923, 88193), (3397, 75887), (10841, 23779), (11137, 23147), (12599, 20461)]