19900375

素因数分解:

$5^3\times {\mathrm{11}}^1\times {\mathrm{41}}^1\times {\mathrm{353}}^1$

素因数の和:420

約数の個数: 32

約数和(自身を含む): 27832896

約数和(自身を除く): 7932521

約数列:

[1, 5, 11, 25, 41, 55, 125, 205, 275, 353, 451, 1025, 1375, 1765, 2255, 3883, 5125, 8825, 11275, 14473, 19415, 44125, 56375, 72365, 97075, 159203, 361825, 485375, 796015, 1809125, 3980075, 19900375]

約数ペア:

[(1, 19900375), (5, 3980075), (11, 1809125), (25, 796015), (41, 485375), (55, 361825), (125, 159203), (205, 97075), (275, 72365), (353, 56375), (451, 44125), (1025, 19415), (1375, 14473), (1765, 11275), (2255, 8825), (3883, 5125)]