20529040

素因数分解:

$2^4\times 5^1\times 7^2\times {\mathrm{5237}}^1$

素因数の和:5264

約数の個数: 60

約数和(自身を含む): 55533276

約数和(自身を除く): 35004236

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 49, 56, 70, 80, 98, 112, 140, 196, 245, 280, 392, 490, 560, 784, 980, 1960, 3920, 5237, 10474, 20948, 26185, 36659, 41896, 52370, 73318, 83792, 104740, 146636, 183295, 209480, 256613, 293272, 366590, 418960, 513226, 586544, 733180, 1026452, 1283065, 1466360, 2052904, 2566130, 2932720, 4105808, 5132260, 10264520, 20529040]

約数ペア:

[(1, 20529040), (2, 10264520), (4, 5132260), (5, 4105808), (7, 2932720), (8, 2566130), (10, 2052904), (14, 1466360), (16, 1283065), (20, 1026452), (28, 733180), (35, 586544), (40, 513226), (49, 418960), (56, 366590), (70, 293272), (80, 256613), (98, 209480), (112, 183295), (140, 146636), (196, 104740), (245, 83792), (280, 73318), (392, 52370), (490, 41896), (560, 36659), (784, 26185), (980, 20948), (1960, 10474), (3920, 5237)]