81425680

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{97}}^1\times {\mathrm{1499}}^1$

素因数の和:1616

約数の個数: 80

約数和(自身を含む): 218736000

約数和(自身を除く): 137310320

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 56, 70, 80, 97, 112, 140, 194, 280, 388, 485, 560, 679, 776, 970, 1358, 1499, 1552, 1940, 2716, 2998, 3395, 3880, 5432, 5996, 6790, 7495, 7760, 10493, 10864, 11992, 13580, 14990, 20986, 23984, 27160, 29980, 41972, 52465, 54320, 59960, 83944, 104930, 119920, 145403, 167888, 209860, 290806, 419720, 581612, 727015, 839440, 1017821, 1163224, 1454030, 2035642, 2326448, 2908060, 4071284, 5089105, 5816120, 8142568, 10178210, 11632240, 16285136, 20356420, 40712840, 81425680]

約数ペア:

[(1, 81425680), (2, 40712840), (4, 20356420), (5, 16285136), (7, 11632240), (8, 10178210), (10, 8142568), (14, 5816120), (16, 5089105), (20, 4071284), (28, 2908060), (35, 2326448), (40, 2035642), (56, 1454030), (70, 1163224), (80, 1017821), (97, 839440), (112, 727015), (140, 581612), (194, 419720), (280, 290806), (388, 209860), (485, 167888), (560, 145403), (679, 119920), (776, 104930), (970, 83944), (1358, 59960), (1499, 54320), (1552, 52465), (1940, 41972), (2716, 29980), (2998, 27160), (3395, 23984), (3880, 20986), (5432, 14990), (5996, 13580), (6790, 11992), (7495, 10864), (7760, 10493)]