81920457

素因数分解:

$3^3\times {\mathrm{19}}^1\times {\mathrm{23}}^1\times {\mathrm{53}}^1\times {\mathrm{131}}^1$

素因数の和:235

約数の個数: 64

約数和(自身を含む): 136857600

約数和(自身を除く): 54937143

約数列:

[1, 3, 9, 19, 23, 27, 53, 57, 69, 131, 159, 171, 207, 393, 437, 477, 513, 621, 1007, 1179, 1219, 1311, 1431, 2489, 3013, 3021, 3537, 3657, 3933, 6943, 7467, 9039, 9063, 10971, 11799, 20829, 22401, 23161, 27117, 27189, 32913, 57247, 62487, 67203, 69483, 81351, 131917, 159689, 171741, 187461, 208449, 395751, 479067, 515223, 625347, 1187253, 1437201, 1545669, 3034091, 3561759, 4311603, 9102273, 27306819, 81920457]

約数ペア:

[(1, 81920457), (3, 27306819), (9, 9102273), (19, 4311603), (23, 3561759), (27, 3034091), (53, 1545669), (57, 1437201), (69, 1187253), (131, 625347), (159, 515223), (171, 479067), (207, 395751), (393, 208449), (437, 187461), (477, 171741), (513, 159689), (621, 131917), (1007, 81351), (1179, 69483), (1219, 67203), (1311, 62487), (1431, 57247), (2489, 32913), (3013, 27189), (3021, 27117), (3537, 23161), (3657, 22401), (3933, 20829), (6943, 11799), (7467, 10971), (9039, 9063)]