20118021

素因数分解:

$3^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{47}}^1\times {\mathrm{109}}^1$

素因数の和:194

約数の個数: 64

約数和(自身を含む): 36495360

約数和(自身を除く): 16377339

約数列:

[1, 3, 7, 11, 17, 21, 33, 47, 51, 77, 109, 119, 141, 187, 231, 327, 329, 357, 517, 561, 763, 799, 987, 1199, 1309, 1551, 1853, 2289, 2397, 3597, 3619, 3927, 5123, 5559, 5593, 8393, 8789, 10857, 12971, 15369, 16779, 20383, 25179, 26367, 35861, 38913, 56353, 61149, 61523, 87091, 107583, 142681, 169059, 184569, 261273, 394471, 428043, 609637, 958001, 1183413, 1828911, 2874003, 6706007, 20118021]

約数ペア:

[(1, 20118021), (3, 6706007), (7, 2874003), (11, 1828911), (17, 1183413), (21, 958001), (33, 609637), (47, 428043), (51, 394471), (77, 261273), (109, 184569), (119, 169059), (141, 142681), (187, 107583), (231, 87091), (327, 61523), (329, 61149), (357, 56353), (517, 38913), (561, 35861), (763, 26367), (799, 25179), (987, 20383), (1199, 16779), (1309, 15369), (1551, 12971), (1853, 10857), (2289, 8789), (2397, 8393), (3597, 5593), (3619, 5559), (3927, 5123)]