20655320

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{71}}^1\times {\mathrm{1039}}^1$

素因数の和:1128

約数の個数: 64

約数和(自身を含む): 53913600

約数和(自身を除く): 33258280

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 71, 140, 142, 280, 284, 355, 497, 568, 710, 994, 1039, 1420, 1988, 2078, 2485, 2840, 3976, 4156, 4970, 5195, 7273, 8312, 9940, 10390, 14546, 19880, 20780, 29092, 36365, 41560, 58184, 72730, 73769, 145460, 147538, 290920, 295076, 368845, 516383, 590152, 737690, 1032766, 1475380, 2065532, 2581915, 2950760, 4131064, 5163830, 10327660, 20655320]

約数ペア:

[(1, 20655320), (2, 10327660), (4, 5163830), (5, 4131064), (7, 2950760), (8, 2581915), (10, 2065532), (14, 1475380), (20, 1032766), (28, 737690), (35, 590152), (40, 516383), (56, 368845), (70, 295076), (71, 290920), (140, 147538), (142, 145460), (280, 73769), (284, 72730), (355, 58184), (497, 41560), (568, 36365), (710, 29092), (994, 20780), (1039, 19880), (1420, 14546), (1988, 10390), (2078, 9940), (2485, 8312), (2840, 7273), (3976, 5195), (4156, 4970)]