66837980

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^2\times {\mathrm{71}}^1\times {\mathrm{389}}^1$

素因数の和:491

約数の個数: 72

約数和(自身を含む): 156854880

約数和(自身を除く): 90016900

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 71, 110, 121, 142, 220, 242, 284, 355, 389, 484, 605, 710, 778, 781, 1210, 1420, 1556, 1562, 1945, 2420, 3124, 3890, 3905, 4279, 7780, 7810, 8558, 8591, 15620, 17116, 17182, 21395, 27619, 34364, 42790, 42955, 47069, 55238, 85580, 85910, 94138, 110476, 138095, 171820, 188276, 235345, 276190, 303809, 470690, 552380, 607618, 941380, 1215236, 1519045, 3038090, 3341899, 6076180, 6683798, 13367596, 16709495, 33418990, 66837980]

約数ペア:

[(1, 66837980), (2, 33418990), (4, 16709495), (5, 13367596), (10, 6683798), (11, 6076180), (20, 3341899), (22, 3038090), (44, 1519045), (55, 1215236), (71, 941380), (110, 607618), (121, 552380), (142, 470690), (220, 303809), (242, 276190), (284, 235345), (355, 188276), (389, 171820), (484, 138095), (605, 110476), (710, 94138), (778, 85910), (781, 85580), (1210, 55238), (1420, 47069), (1556, 42955), (1562, 42790), (1945, 34364), (2420, 27619), (3124, 21395), (3890, 17182), (3905, 17116), (4279, 15620), (7780, 8591), (7810, 8558)]