20210571388

素因数分解:

$2^2\times 7^1\times {\mathrm{721806121}}^1$

素因数の和:721806132

約数の個数: 12

約数和(自身を含む): 40421142832

約数和(自身を除く): 20210571444

約数列:

[1, 2, 4, 7, 14, 28, 721806121, 1443612242, 2887224484, 5052642847, 10105285694, 20210571388]

約数ペア:

[(1, 20210571388), (2, 10105285694), (4, 5052642847), (7, 2887224484), (14, 1443612242), (28, 721806121)]