20455197

素因数分解:

$3^1\times 7^2\times {\mathrm{227}}^1\times {\mathrm{613}}^1$

素因数の和:857

約数の個数: 24

約数和(自身を含む): 31918176

約数和(自身を除く): 11462979

約数列:

[1, 3, 7, 21, 49, 147, 227, 613, 681, 1589, 1839, 4291, 4767, 11123, 12873, 30037, 33369, 90111, 139151, 417453, 974057, 2922171, 6818399, 20455197]

約数ペア:

[(1, 20455197), (3, 6818399), (7, 2922171), (21, 974057), (49, 417453), (147, 139151), (227, 90111), (613, 33369), (681, 30037), (1589, 12873), (1839, 11123), (4291, 4767)]