20978992

素因数分解:

$2^4\times {\mathrm{139}}^1\times {\mathrm{9433}}^1$

素因数の和:9580

約数の個数: 20

約数和(自身を含む): 40943560

約数和(自身を除く): 19964568

約数列:

[1, 2, 4, 8, 16, 139, 278, 556, 1112, 2224, 9433, 18866, 37732, 75464, 150928, 1311187, 2622374, 5244748, 10489496, 20978992]

約数ペア:

[(1, 20978992), (2, 10489496), (4, 5244748), (8, 2622374), (16, 1311187), (139, 150928), (278, 75464), (556, 37732), (1112, 18866), (2224, 9433)]