21381327

素因数分解:

$3^5\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{421}}^1$

素因数の和:466

約数の個数: 48

約数和(自身を含む): 36865920

約数和(自身を除く): 15484593

約数列:

[1, 3, 9, 11, 19, 27, 33, 57, 81, 99, 171, 209, 243, 297, 421, 513, 627, 891, 1263, 1539, 1881, 2673, 3789, 4617, 4631, 5643, 7999, 11367, 13893, 16929, 23997, 34101, 41679, 50787, 71991, 87989, 102303, 125037, 215973, 263967, 375111, 647919, 791901, 1125333, 1943757, 2375703, 7127109, 21381327]

約数ペア:

[(1, 21381327), (3, 7127109), (9, 2375703), (11, 1943757), (19, 1125333), (27, 791901), (33, 647919), (57, 375111), (81, 263967), (99, 215973), (171, 125037), (209, 102303), (243, 87989), (297, 71991), (421, 50787), (513, 41679), (627, 34101), (891, 23997), (1263, 16929), (1539, 13893), (1881, 11367), (2673, 7999), (3789, 5643), (4617, 4631)]