27981639

素因数分解:

$3^3\times 7^1\times {\mathrm{23}}^1\times {\mathrm{41}}^1\times {\mathrm{157}}^1$

素因数の和:237

約数の個数: 64

約数和(自身を含む): 50964480

約数和(自身を除く): 22982841

約数列:

[1, 3, 7, 9, 21, 23, 27, 41, 63, 69, 123, 157, 161, 189, 207, 287, 369, 471, 483, 621, 861, 943, 1099, 1107, 1413, 1449, 2583, 2829, 3297, 3611, 4239, 4347, 6437, 6601, 7749, 8487, 9891, 10833, 19311, 19803, 25277, 25461, 29673, 32499, 45059, 57933, 59409, 75831, 97497, 135177, 148051, 173799, 178227, 227493, 405531, 444153, 682479, 1036357, 1216593, 1332459, 3109071, 3997377, 9327213, 27981639]

約数ペア:

[(1, 27981639), (3, 9327213), (7, 3997377), (9, 3109071), (21, 1332459), (23, 1216593), (27, 1036357), (41, 682479), (63, 444153), (69, 405531), (123, 227493), (157, 178227), (161, 173799), (189, 148051), (207, 135177), (287, 97497), (369, 75831), (471, 59409), (483, 57933), (621, 45059), (861, 32499), (943, 29673), (1099, 25461), (1107, 25277), (1413, 19803), (1449, 19311), (2583, 10833), (2829, 9891), (3297, 8487), (3611, 7749), (4239, 6601), (4347, 6437)]