20291180

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{11149}}^1$

素因数の和:11178

約数の個数: 48

約数和(自身を含む): 52449600

約数和(自身を除く): 32158420

約数列:

[1, 2, 4, 5, 7, 10, 13, 14, 20, 26, 28, 35, 52, 65, 70, 91, 130, 140, 182, 260, 364, 455, 910, 1820, 11149, 22298, 44596, 55745, 78043, 111490, 144937, 156086, 222980, 289874, 312172, 390215, 579748, 724685, 780430, 1014559, 1449370, 1560860, 2029118, 2898740, 4058236, 5072795, 10145590, 20291180]

約数ペア:

[(1, 20291180), (2, 10145590), (4, 5072795), (5, 4058236), (7, 2898740), (10, 2029118), (13, 1560860), (14, 1449370), (20, 1014559), (26, 780430), (28, 724685), (35, 579748), (52, 390215), (65, 312172), (70, 289874), (91, 222980), (130, 156086), (140, 144937), (182, 111490), (260, 78043), (364, 55745), (455, 44596), (910, 22298), (1820, 11149)]