21039998

素因数分解:

$2^1\times 7^1\times {\mathrm{61}}^1\times {\mathrm{71}}^1\times {\mathrm{347}}^1$

素因数の和:488

約数の個数: 32

約数和(自身を含む): 37283328

約数和(自身を除く): 16243330

約数列:

[1, 2, 7, 14, 61, 71, 122, 142, 347, 427, 497, 694, 854, 994, 2429, 4331, 4858, 8662, 21167, 24637, 30317, 42334, 49274, 60634, 148169, 172459, 296338, 344918, 1502857, 3005714, 10519999, 21039998]

約数ペア:

[(1, 21039998), (2, 10519999), (7, 3005714), (14, 1502857), (61, 344918), (71, 296338), (122, 172459), (142, 148169), (347, 60634), (427, 49274), (497, 42334), (694, 30317), (854, 24637), (994, 21167), (2429, 8662), (4331, 4858)]