20587825

素因数分解:

$5^2\times {\mathrm{29}}^1\times {\mathrm{73}}^1\times {\mathrm{389}}^1$

素因数の和:501

約数の個数: 24

約数和(自身を含む): 26839800

約数和(自身を除く): 6251975

約数列:

[1, 5, 25, 29, 73, 145, 365, 389, 725, 1825, 1945, 2117, 9725, 10585, 11281, 28397, 52925, 56405, 141985, 282025, 709925, 823513, 4117565, 20587825]

約数ペア:

[(1, 20587825), (5, 4117565), (25, 823513), (29, 709925), (73, 282025), (145, 141985), (365, 56405), (389, 52925), (725, 28397), (1825, 11281), (1945, 10585), (2117, 9725)]