81189920

素因数分解:

$2^5\times 5^1\times 7^1\times {\mathrm{71}}^1\times {\mathrm{1021}}^1$

素因数の和:1114

約数の個数: 96

約数和(自身を含む): 222518016

約数和(自身を除く): 141328096

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 32, 35, 40, 56, 70, 71, 80, 112, 140, 142, 160, 224, 280, 284, 355, 497, 560, 568, 710, 994, 1021, 1120, 1136, 1420, 1988, 2042, 2272, 2485, 2840, 3976, 4084, 4970, 5105, 5680, 7147, 7952, 8168, 9940, 10210, 11360, 14294, 15904, 16336, 19880, 20420, 28588, 32672, 35735, 39760, 40840, 57176, 71470, 72491, 79520, 81680, 114352, 142940, 144982, 163360, 228704, 285880, 289964, 362455, 507437, 571760, 579928, 724910, 1014874, 1143520, 1159856, 1449820, 2029748, 2319712, 2537185, 2899640, 4059496, 5074370, 5799280, 8118992, 10148740, 11598560, 16237984, 20297480, 40594960, 81189920]

約数ペア:

[(1, 81189920), (2, 40594960), (4, 20297480), (5, 16237984), (7, 11598560), (8, 10148740), (10, 8118992), (14, 5799280), (16, 5074370), (20, 4059496), (28, 2899640), (32, 2537185), (35, 2319712), (40, 2029748), (56, 1449820), (70, 1159856), (71, 1143520), (80, 1014874), (112, 724910), (140, 579928), (142, 571760), (160, 507437), (224, 362455), (280, 289964), (284, 285880), (355, 228704), (497, 163360), (560, 144982), (568, 142940), (710, 114352), (994, 81680), (1021, 79520), (1120, 72491), (1136, 71470), (1420, 57176), (1988, 40840), (2042, 39760), (2272, 35735), (2485, 32672), (2840, 28588), (3976, 20420), (4084, 19880), (4970, 16336), (5105, 15904), (5680, 14294), (7147, 11360), (7952, 10210), (8168, 9940)]