18521789

素因数分解:

${\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{401}}^1$

素因数の和:461

約数の個数: 32

約数和(自身を含む): 24312960

約数和(自身を除く): 5791171

約数列:

[1, 11, 13, 17, 19, 143, 187, 209, 221, 247, 323, 401, 2431, 2717, 3553, 4199, 4411, 5213, 6817, 7619, 46189, 57343, 74987, 83809, 88621, 99047, 129523, 974831, 1089517, 1424753, 1683799, 18521789]

約数ペア:

[(1, 18521789), (11, 1683799), (13, 1424753), (17, 1089517), (19, 974831), (143, 129523), (187, 99047), (209, 88621), (221, 83809), (247, 74987), (323, 57343), (401, 46189), (2431, 7619), (2717, 6817), (3553, 5213), (4199, 4411)]