20540555

素因数分解:

$5^1\times 7^4\times {\mathrm{29}}^1\times {\mathrm{59}}^1$

素因数の和:121

約数の個数: 40

約数和(自身を含む): 30250800

約数和(自身を除く): 9710245

約数列:

[1, 5, 7, 29, 35, 49, 59, 145, 203, 245, 295, 343, 413, 1015, 1421, 1711, 1715, 2065, 2401, 2891, 7105, 8555, 9947, 11977, 12005, 14455, 20237, 49735, 59885, 69629, 83839, 101185, 141659, 348145, 419195, 586873, 708295, 2934365, 4108111, 20540555]

約数ペア:

[(1, 20540555), (5, 4108111), (7, 2934365), (29, 708295), (35, 586873), (49, 419195), (59, 348145), (145, 141659), (203, 101185), (245, 83839), (295, 69629), (343, 59885), (413, 49735), (1015, 20237), (1421, 14455), (1711, 12005), (1715, 11977), (2065, 9947), (2401, 8555), (2891, 7105)]