81210921

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{19}}^2\times {\mathrm{401}}^1$

素因数の和:470

約数の個数: 48

約数和(自身を含む): 132331968

約数和(自身を除く): 51121047

約数列:

[1, 3, 11, 17, 19, 33, 51, 57, 187, 209, 323, 361, 401, 561, 627, 969, 1083, 1203, 3553, 3971, 4411, 6137, 6817, 7619, 10659, 11913, 13233, 18411, 20451, 22857, 67507, 74987, 83809, 129523, 144761, 202521, 224961, 251427, 388569, 434283, 1424753, 1592371, 2460937, 4274259, 4777113, 7382811, 27070307, 81210921]

約数ペア:

[(1, 81210921), (3, 27070307), (11, 7382811), (17, 4777113), (19, 4274259), (33, 2460937), (51, 1592371), (57, 1424753), (187, 434283), (209, 388569), (323, 251427), (361, 224961), (401, 202521), (561, 144761), (627, 129523), (969, 83809), (1083, 74987), (1203, 67507), (3553, 22857), (3971, 20451), (4411, 18411), (6137, 13233), (6817, 11913), (7619, 10659)]