20804740

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^2\times {\mathrm{8597}}^1$

素因数の和:8628

約数の個数: 36

約数和(自身を含む): 48028428

約数和(自身を除く): 27223688

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 110, 121, 220, 242, 484, 605, 1210, 2420, 8597, 17194, 34388, 42985, 85970, 94567, 171940, 189134, 378268, 472835, 945670, 1040237, 1891340, 2080474, 4160948, 5201185, 10402370, 20804740]

約数ペア:

[(1, 20804740), (2, 10402370), (4, 5201185), (5, 4160948), (10, 2080474), (11, 1891340), (20, 1040237), (22, 945670), (44, 472835), (55, 378268), (110, 189134), (121, 171940), (220, 94567), (242, 85970), (484, 42985), (605, 34388), (1210, 17194), (2420, 8597)]