12638775

素因数分解:

$3^1\times 5^2\times {\mathrm{43}}^1\times {\mathrm{3919}}^1$

素因数の和:3975

約数の個数: 24

約数和(自身を含む): 21387520

約数和(自身を除く): 8748745

約数列:

[1, 3, 5, 15, 25, 43, 75, 129, 215, 645, 1075, 3225, 3919, 11757, 19595, 58785, 97975, 168517, 293925, 505551, 842585, 2527755, 4212925, 12638775]

約数ペア:

[(1, 12638775), (3, 4212925), (5, 2527755), (15, 842585), (25, 505551), (43, 293925), (75, 168517), (129, 97975), (215, 58785), (645, 19595), (1075, 11757), (3225, 3919)]