21537575

素因数分解:

$5^2\times {\mathrm{29}}^1\times {\mathrm{61}}^1\times {\mathrm{487}}^1$

素因数の和:587

約数の個数: 24

約数和(自身を含む): 28138080

約数和(自身を除く): 6600505

約数列:

[1, 5, 25, 29, 61, 145, 305, 487, 725, 1525, 1769, 2435, 8845, 12175, 14123, 29707, 44225, 70615, 148535, 353075, 742675, 861503, 4307515, 21537575]

約数ペア:

[(1, 21537575), (5, 4307515), (25, 861503), (29, 742675), (61, 353075), (145, 148535), (305, 70615), (487, 44225), (725, 29707), (1525, 14123), (1769, 12175), (2435, 8845)]