208518989

素因数分解:

$7^1\times {\mathrm{23}}^1\times {\mathrm{31}}^1\times {\mathrm{41}}^1\times {\mathrm{1019}}^1$

素因数の和:1121

約数の個数: 32

約数和(自身を含む): 263208960

約数和(自身を除く): 54689971

約数列:

[1, 7, 23, 31, 41, 161, 217, 287, 713, 943, 1019, 1271, 4991, 6601, 7133, 8897, 23437, 29233, 31589, 41779, 164059, 204631, 221123, 292453, 726547, 960917, 1295149, 5085829, 6726419, 9066043, 29788427, 208518989]

約数ペア:

[(1, 208518989), (7, 29788427), (23, 9066043), (31, 6726419), (41, 5085829), (161, 1295149), (217, 960917), (287, 726547), (713, 292453), (943, 221123), (1019, 204631), (1271, 164059), (4991, 41779), (6601, 31589), (7133, 29233), (8897, 23437)]