19680892

素因数分解:

$2^2\times 7^1\times {\mathrm{11}}^2\times {\mathrm{37}}^1\times {\mathrm{157}}^1$

素因数の和:227

約数の個数: 72

約数和(自身を含む): 44717792

約数和(自身を除く): 25036900

約数列:

[1, 2, 4, 7, 11, 14, 22, 28, 37, 44, 74, 77, 121, 148, 154, 157, 242, 259, 308, 314, 407, 484, 518, 628, 814, 847, 1036, 1099, 1628, 1694, 1727, 2198, 2849, 3388, 3454, 4396, 4477, 5698, 5809, 6908, 8954, 11396, 11618, 12089, 17908, 18997, 23236, 24178, 31339, 37994, 40663, 48356, 62678, 63899, 75988, 81326, 125356, 127798, 132979, 162652, 255596, 265958, 447293, 531916, 702889, 894586, 1405778, 1789172, 2811556, 4920223, 9840446, 19680892]

約数ペア:

[(1, 19680892), (2, 9840446), (4, 4920223), (7, 2811556), (11, 1789172), (14, 1405778), (22, 894586), (28, 702889), (37, 531916), (44, 447293), (74, 265958), (77, 255596), (121, 162652), (148, 132979), (154, 127798), (157, 125356), (242, 81326), (259, 75988), (308, 63899), (314, 62678), (407, 48356), (484, 40663), (518, 37994), (628, 31339), (814, 24178), (847, 23236), (1036, 18997), (1099, 17908), (1628, 12089), (1694, 11618), (1727, 11396), (2198, 8954), (2849, 6908), (3388, 5809), (3454, 5698), (4396, 4477)]