20871220

素因数分解:

$2^2\times 5^1\times {\mathrm{151}}^1\times {\mathrm{6911}}^1$

素因数の和:7071

約数の個数: 24

約数和(自身を含む): 44126208

約数和(自身を除く): 23254988

約数列:

[1, 2, 4, 5, 10, 20, 151, 302, 604, 755, 1510, 3020, 6911, 13822, 27644, 34555, 69110, 138220, 1043561, 2087122, 4174244, 5217805, 10435610, 20871220]

約数ペア:

[(1, 20871220), (2, 10435610), (4, 5217805), (5, 4174244), (10, 2087122), (20, 1043561), (151, 138220), (302, 69110), (604, 34555), (755, 27644), (1510, 13822), (3020, 6911)]