21221540

素因数分解:

$2^2\times 5^1\times {\mathrm{151}}^1\times {\mathrm{7027}}^1$

素因数の和:7187

約数の個数: 24

約数和(自身を含む): 44866752

約数和(自身を除く): 23645212

約数列:

[1, 2, 4, 5, 10, 20, 151, 302, 604, 755, 1510, 3020, 7027, 14054, 28108, 35135, 70270, 140540, 1061077, 2122154, 4244308, 5305385, 10610770, 21221540]

約数ペア:

[(1, 21221540), (2, 10610770), (4, 5305385), (5, 4244308), (10, 2122154), (20, 1061077), (151, 140540), (302, 70270), (604, 35135), (755, 28108), (1510, 14054), (3020, 7027)]