21648025

素因数分解:

$5^2\times 7^1\times {\mathrm{103}}^1\times {\mathrm{1201}}^1$

素因数の和:1321

約数の個数: 24

約数和(自身を含む): 31001984

約数和(自身を除く): 9353959

約数列:

[1, 5, 7, 25, 35, 103, 175, 515, 721, 1201, 2575, 3605, 6005, 8407, 18025, 30025, 42035, 123703, 210175, 618515, 865921, 3092575, 4329605, 21648025]

約数ペア:

[(1, 21648025), (5, 4329605), (7, 3092575), (25, 865921), (35, 618515), (103, 210175), (175, 123703), (515, 42035), (721, 30025), (1201, 18025), (2575, 8407), (3605, 6005)]