21681776

素因数分解:

$2^4\times {\mathrm{139}}^1\times {\mathrm{9749}}^1$

素因数の和:9896

約数の個数: 20

約数和(自身を含む): 42315000

約数和(自身を除く): 20633224

約数列:

[1, 2, 4, 8, 16, 139, 278, 556, 1112, 2224, 9749, 19498, 38996, 77992, 155984, 1355111, 2710222, 5420444, 10840888, 21681776]

約数ペア:

[(1, 21681776), (2, 10840888), (4, 5420444), (8, 2710222), (16, 1355111), (139, 155984), (278, 77992), (556, 38996), (1112, 19498), (2224, 9749)]