20901265

素因数分解:

$5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{233}}^2$

素因数の和:489

約数の個数: 24

約数和(自身を含む): 31405248

約数和(自身を除く): 10503983

約数列:

[1, 5, 7, 11, 35, 55, 77, 233, 385, 1165, 1631, 2563, 8155, 12815, 17941, 54289, 89705, 271445, 380023, 597179, 1900115, 2985895, 4180253, 20901265]

約数ペア:

[(1, 20901265), (5, 4180253), (7, 2985895), (11, 1900115), (35, 597179), (55, 380023), (77, 271445), (233, 89705), (385, 54289), (1165, 17941), (1631, 12815), (2563, 8155)]