21605725

素因数分解:

$5^2\times {\mathrm{17}}^1\times {\mathrm{29}}^1\times {\mathrm{1753}}^1$

素因数の和:1809

約数の個数: 24

約数和(自身を含む): 29361960

約数和(自身を除く): 7756235

約数列:

[1, 5, 17, 25, 29, 85, 145, 425, 493, 725, 1753, 2465, 8765, 12325, 29801, 43825, 50837, 149005, 254185, 745025, 864229, 1270925, 4321145, 21605725]

約数ペア:

[(1, 21605725), (5, 4321145), (17, 1270925), (25, 864229), (29, 745025), (85, 254185), (145, 149005), (425, 50837), (493, 43825), (725, 29801), (1753, 12325), (2465, 8765)]