20816530

素因数分解:

$2^1\times 5^1\times 7^1\times {\mathrm{347}}^1\times {\mathrm{857}}^1$

素因数の和:1218

約数の個数: 32

約数和(自身を含む): 42996096

約数和(自身を除く): 22179566

約数列:

[1, 2, 5, 7, 10, 14, 35, 70, 347, 694, 857, 1714, 1735, 2429, 3470, 4285, 4858, 5999, 8570, 11998, 12145, 24290, 29995, 59990, 297379, 594758, 1486895, 2081653, 2973790, 4163306, 10408265, 20816530]

約数ペア:

[(1, 20816530), (2, 10408265), (5, 4163306), (7, 2973790), (10, 2081653), (14, 1486895), (35, 594758), (70, 297379), (347, 59990), (694, 29995), (857, 24290), (1714, 12145), (1735, 11998), (2429, 8570), (3470, 5999), (4285, 4858)]