18758871

素因数分解:

$3^5\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{239}}^1$

素因数の和:290

約数の個数: 48

約数和(自身を含む): 31449600

約数和(自身を除く): 12690729

約数列:

[1, 3, 9, 17, 19, 27, 51, 57, 81, 153, 171, 239, 243, 323, 459, 513, 717, 969, 1377, 1539, 2151, 2907, 4063, 4131, 4541, 4617, 6453, 8721, 12189, 13623, 19359, 26163, 36567, 40869, 58077, 77197, 78489, 109701, 122607, 231591, 329103, 367821, 694773, 987309, 1103463, 2084319, 6252957, 18758871]

約数ペア:

[(1, 18758871), (3, 6252957), (9, 2084319), (17, 1103463), (19, 987309), (27, 694773), (51, 367821), (57, 329103), (81, 231591), (153, 122607), (171, 109701), (239, 78489), (243, 77197), (323, 58077), (459, 40869), (513, 36567), (717, 26163), (969, 19359), (1377, 13623), (1539, 12189), (2151, 8721), (2907, 6453), (4063, 4617), (4131, 4541)]