81221560

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{107}}^1\times {\mathrm{2711}}^1$

素因数の和:2836

約数の個数: 64

約数和(自身を含む): 210885120

約数和(自身を除く): 129663560

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 107, 140, 214, 280, 428, 535, 749, 856, 1070, 1498, 2140, 2711, 2996, 3745, 4280, 5422, 5992, 7490, 10844, 13555, 14980, 18977, 21688, 27110, 29960, 37954, 54220, 75908, 94885, 108440, 151816, 189770, 290077, 379540, 580154, 759080, 1160308, 1450385, 2030539, 2320616, 2900770, 4061078, 5801540, 8122156, 10152695, 11603080, 16244312, 20305390, 40610780, 81221560]

約数ペア:

[(1, 81221560), (2, 40610780), (4, 20305390), (5, 16244312), (7, 11603080), (8, 10152695), (10, 8122156), (14, 5801540), (20, 4061078), (28, 2900770), (35, 2320616), (40, 2030539), (56, 1450385), (70, 1160308), (107, 759080), (140, 580154), (214, 379540), (280, 290077), (428, 189770), (535, 151816), (749, 108440), (856, 94885), (1070, 75908), (1498, 54220), (2140, 37954), (2711, 29960), (2996, 27110), (3745, 21688), (4280, 18977), (5422, 14980), (5992, 13555), (7490, 10844)]