21531100

素因数分解:

$2^2\times 5^2\times {\mathrm{139}}^1\times {\mathrm{1549}}^1$

素因数の和:1702

約数の個数: 36

約数和(自身を含む): 47089000

約数和(自身を除く): 25557900

約数列:

[1, 2, 4, 5, 10, 20, 25, 50, 100, 139, 278, 556, 695, 1390, 1549, 2780, 3098, 3475, 6196, 6950, 7745, 13900, 15490, 30980, 38725, 77450, 154900, 215311, 430622, 861244, 1076555, 2153110, 4306220, 5382775, 10765550, 21531100]

約数ペア:

[(1, 21531100), (2, 10765550), (4, 5382775), (5, 4306220), (10, 2153110), (20, 1076555), (25, 861244), (50, 430622), (100, 215311), (139, 154900), (278, 77450), (556, 38725), (695, 30980), (1390, 15490), (1549, 13900), (2780, 7745), (3098, 6950), (3475, 6196)]