81338840

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{401}}^1\times {\mathrm{461}}^1$

素因数の和:884

約数の個数: 64

約数和(自身を含む): 200581920

約数和(自身を除く): 119243080

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 55, 88, 110, 220, 401, 440, 461, 802, 922, 1604, 1844, 2005, 2305, 3208, 3688, 4010, 4411, 4610, 5071, 8020, 8822, 9220, 10142, 16040, 17644, 18440, 20284, 22055, 25355, 35288, 40568, 44110, 50710, 88220, 101420, 176440, 184861, 202840, 369722, 739444, 924305, 1478888, 1848610, 2033471, 3697220, 4066942, 7394440, 8133884, 10167355, 16267768, 20334710, 40669420, 81338840]

約数ペア:

[(1, 81338840), (2, 40669420), (4, 20334710), (5, 16267768), (8, 10167355), (10, 8133884), (11, 7394440), (20, 4066942), (22, 3697220), (40, 2033471), (44, 1848610), (55, 1478888), (88, 924305), (110, 739444), (220, 369722), (401, 202840), (440, 184861), (461, 176440), (802, 101420), (922, 88220), (1604, 50710), (1844, 44110), (2005, 40568), (2305, 35288), (3208, 25355), (3688, 22055), (4010, 20284), (4411, 18440), (4610, 17644), (5071, 16040), (8020, 10142), (8822, 9220)]