21169240

素因数分解:

$2^3\times 5^1\times {\mathrm{137}}^1\times {\mathrm{3863}}^1$

素因数の和:4011

約数の個数: 32

約数和(自身を含む): 47990880

約数和(自身を除く): 26821640

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 137, 274, 548, 685, 1096, 1370, 2740, 3863, 5480, 7726, 15452, 19315, 30904, 38630, 77260, 154520, 529231, 1058462, 2116924, 2646155, 4233848, 5292310, 10584620, 21169240]

約数ペア:

[(1, 21169240), (2, 10584620), (4, 5292310), (5, 4233848), (8, 2646155), (10, 2116924), (20, 1058462), (40, 529231), (137, 154520), (274, 77260), (548, 38630), (685, 30904), (1096, 19315), (1370, 15452), (2740, 7726), (3863, 5480)]