21097240

素因数分解:

$2^3\times 5^1\times {\mathrm{127}}^1\times {\mathrm{4153}}^1$

素因数の和:4291

約数の個数: 32

約数和(自身を含む): 47854080

約数和(自身を除く): 26756840

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 127, 254, 508, 635, 1016, 1270, 2540, 4153, 5080, 8306, 16612, 20765, 33224, 41530, 83060, 166120, 527431, 1054862, 2109724, 2637155, 4219448, 5274310, 10548620, 21097240]

約数ペア:

[(1, 21097240), (2, 10548620), (4, 5274310), (5, 4219448), (8, 2637155), (10, 2109724), (20, 1054862), (40, 527431), (127, 166120), (254, 83060), (508, 41530), (635, 33224), (1016, 20765), (1270, 16612), (2540, 8306), (4153, 5080)]