21195027

素因数分解:

$3^4\times 7^1\times {\mathrm{29}}^1\times {\mathrm{1289}}^1$

素因数の和:1337

約数の個数: 40

約数和(自身を含む): 37461600

約数和(自身を除く): 16266573

約数列:

[1, 3, 7, 9, 21, 27, 29, 63, 81, 87, 189, 203, 261, 567, 609, 783, 1289, 1827, 2349, 3867, 5481, 9023, 11601, 16443, 27069, 34803, 37381, 81207, 104409, 112143, 243621, 261667, 336429, 730863, 785001, 1009287, 2355003, 3027861, 7065009, 21195027]

約数ペア:

[(1, 21195027), (3, 7065009), (7, 3027861), (9, 2355003), (21, 1009287), (27, 785001), (29, 730863), (63, 336429), (81, 261667), (87, 243621), (189, 112143), (203, 104409), (261, 81207), (567, 37381), (609, 34803), (783, 27069), (1289, 16443), (1827, 11601), (2349, 9023), (3867, 5481)]