20807164

素因数分解:

$2^2\times 7^2\times {\mathrm{53}}^1\times {\mathrm{2003}}^1$

素因数の和:2074

約数の個数: 36

約数和(自身を含む): 43178184

約数和(自身を除く): 22371020

約数列:

[1, 2, 4, 7, 14, 28, 49, 53, 98, 106, 196, 212, 371, 742, 1484, 2003, 2597, 4006, 5194, 8012, 10388, 14021, 28042, 56084, 98147, 106159, 196294, 212318, 392588, 424636, 743113, 1486226, 2972452, 5201791, 10403582, 20807164]

約数ペア:

[(1, 20807164), (2, 10403582), (4, 5201791), (7, 2972452), (14, 1486226), (28, 743113), (49, 424636), (53, 392588), (98, 212318), (106, 196294), (196, 106159), (212, 98147), (371, 56084), (742, 28042), (1484, 14021), (2003, 10388), (2597, 8012), (4006, 5194)]