20018005

素因数分解:

$5^1\times 7^1\times {\mathrm{43}}^1\times {\mathrm{47}}^1\times {\mathrm{283}}^1$

素因数の和:385

約数の個数: 32

約数和(自身を含む): 28790784

約数和(自身を除く): 8772779

約数列:

[1, 5, 7, 35, 43, 47, 215, 235, 283, 301, 329, 1415, 1505, 1645, 1981, 2021, 9905, 10105, 12169, 13301, 14147, 60845, 66505, 70735, 85183, 93107, 425915, 465535, 571943, 2859715, 4003601, 20018005]

約数ペア:

[(1, 20018005), (5, 4003601), (7, 2859715), (35, 571943), (43, 465535), (47, 425915), (215, 93107), (235, 85183), (283, 70735), (301, 66505), (329, 60845), (1415, 14147), (1505, 13301), (1645, 12169), (1981, 10105), (2021, 9905)]