20817965

素因数分解:

$5^1\times 7^1\times {\mathrm{383}}^1\times {\mathrm{1553}}^1$

素因数の和:1948

約数の個数: 16

約数和(自身を含む): 28643328

約数和(自身を除く): 7825363

約数列:

[1, 5, 7, 35, 383, 1553, 1915, 2681, 7765, 10871, 13405, 54355, 594799, 2973995, 4163593, 20817965]

約数ペア:

[(1, 20817965), (5, 4163593), (7, 2973995), (35, 594799), (383, 54355), (1553, 13405), (1915, 10871), (2681, 7765)]