20628657

素因数分解:

$3^2\times 7^2\times {\mathrm{29}}^1\times {\mathrm{1613}}^1$

素因数の和:1662

約数の個数: 36

約数和(自身を含む): 35879220

約数和(自身を除く): 15250563

約数列:

[1, 3, 7, 9, 21, 29, 49, 63, 87, 147, 203, 261, 441, 609, 1421, 1613, 1827, 4263, 4839, 11291, 12789, 14517, 33873, 46777, 79037, 101619, 140331, 237111, 327439, 420993, 711333, 982317, 2292073, 2946951, 6876219, 20628657]

約数ペア:

[(1, 20628657), (3, 6876219), (7, 2946951), (9, 2292073), (21, 982317), (29, 711333), (49, 420993), (63, 327439), (87, 237111), (147, 140331), (203, 101619), (261, 79037), (441, 46777), (609, 33873), (1421, 14517), (1613, 12789), (1827, 11291), (4263, 4839)]