16981216

素因数分解:

$2^5\times 7^1\times {\mathrm{41}}^1\times {\mathrm{43}}^2$

素因数の和:144

約数の個数: 72

約数和(自身を含む): 40071024

約数和(自身を除く): 23089808

約数列:

[1, 2, 4, 7, 8, 14, 16, 28, 32, 41, 43, 56, 82, 86, 112, 164, 172, 224, 287, 301, 328, 344, 574, 602, 656, 688, 1148, 1204, 1312, 1376, 1763, 1849, 2296, 2408, 3526, 3698, 4592, 4816, 7052, 7396, 9184, 9632, 12341, 12943, 14104, 14792, 24682, 25886, 28208, 29584, 49364, 51772, 56416, 59168, 75809, 98728, 103544, 151618, 197456, 207088, 303236, 394912, 414176, 530663, 606472, 1061326, 1212944, 2122652, 2425888, 4245304, 8490608, 16981216]

約数ペア:

[(1, 16981216), (2, 8490608), (4, 4245304), (7, 2425888), (8, 2122652), (14, 1212944), (16, 1061326), (28, 606472), (32, 530663), (41, 414176), (43, 394912), (56, 303236), (82, 207088), (86, 197456), (112, 151618), (164, 103544), (172, 98728), (224, 75809), (287, 59168), (301, 56416), (328, 51772), (344, 49364), (574, 29584), (602, 28208), (656, 25886), (688, 24682), (1148, 14792), (1204, 14104), (1312, 12943), (1376, 12341), (1763, 9632), (1849, 9184), (2296, 7396), (2408, 7052), (3526, 4816), (3698, 4592)]