20917240

素因数分解:

$2^3\times 5^1\times {\mathrm{103}}^1\times {\mathrm{5077}}^1$

素因数の和:5191

約数の個数: 32

約数和(自身を含む): 47530080

約数和(自身を除く): 26612840

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 103, 206, 412, 515, 824, 1030, 2060, 4120, 5077, 10154, 20308, 25385, 40616, 50770, 101540, 203080, 522931, 1045862, 2091724, 2614655, 4183448, 5229310, 10458620, 20917240]

約数ペア:

[(1, 20917240), (2, 10458620), (4, 5229310), (5, 4183448), (8, 2614655), (10, 2091724), (20, 1045862), (40, 522931), (103, 203080), (206, 101540), (412, 50770), (515, 40616), (824, 25385), (1030, 20308), (2060, 10154), (4120, 5077)]