28625680

素因数分解:

$2^4\times 5^1\times {\mathrm{179}}^1\times {\mathrm{1999}}^1$

素因数の和:2191

約数の個数: 40

約数和(自身を含む): 66960000

約数和(自身を除く): 38334320

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 179, 358, 716, 895, 1432, 1790, 1999, 2864, 3580, 3998, 7160, 7996, 9995, 14320, 15992, 19990, 31984, 39980, 79960, 159920, 357821, 715642, 1431284, 1789105, 2862568, 3578210, 5725136, 7156420, 14312840, 28625680]

約数ペア:

[(1, 28625680), (2, 14312840), (4, 7156420), (5, 5725136), (8, 3578210), (10, 2862568), (16, 1789105), (20, 1431284), (40, 715642), (80, 357821), (179, 159920), (358, 79960), (716, 39980), (895, 31984), (1432, 19990), (1790, 15992), (1999, 14320), (2864, 9995), (3580, 7996), (3998, 7160)]