20196561

素因数分解:

$3^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{37}}^1\times {\mathrm{139}}^1$

素因数の和:214

約数の個数: 64

約数和(自身を含む): 36771840

約数和(自身を除く): 16575279

約数列:

[1, 3, 7, 11, 17, 21, 33, 37, 51, 77, 111, 119, 139, 187, 231, 259, 357, 407, 417, 561, 629, 777, 973, 1221, 1309, 1529, 1887, 2363, 2849, 2919, 3927, 4403, 4587, 5143, 6919, 7089, 8547, 10703, 13209, 15429, 16541, 20757, 25993, 32109, 36001, 48433, 49623, 56573, 77979, 87431, 108003, 145299, 169719, 181951, 262293, 396011, 545853, 612017, 961741, 1188033, 1836051, 2885223, 6732187, 20196561]

約数ペア:

[(1, 20196561), (3, 6732187), (7, 2885223), (11, 1836051), (17, 1188033), (21, 961741), (33, 612017), (37, 545853), (51, 396011), (77, 262293), (111, 181951), (119, 169719), (139, 145299), (187, 108003), (231, 87431), (259, 77979), (357, 56573), (407, 49623), (417, 48433), (561, 36001), (629, 32109), (777, 25993), (973, 20757), (1221, 16541), (1309, 15429), (1529, 13209), (1887, 10703), (2363, 8547), (2849, 7089), (2919, 6919), (3927, 5143), (4403, 4587)]