21890060

素因数分解:

$2^2\times 5^1\times {\mathrm{53}}^1\times {\mathrm{107}}^1\times {\mathrm{193}}^1$

素因数の和:362

約数の個数: 48

約数和(自身を含む): 47519136

約数和(自身を除く): 25629076

約数列:

[1, 2, 4, 5, 10, 20, 53, 106, 107, 193, 212, 214, 265, 386, 428, 530, 535, 772, 965, 1060, 1070, 1930, 2140, 3860, 5671, 10229, 11342, 20458, 20651, 22684, 28355, 40916, 41302, 51145, 56710, 82604, 102290, 103255, 113420, 204580, 206510, 413020, 1094503, 2189006, 4378012, 5472515, 10945030, 21890060]

約数ペア:

[(1, 21890060), (2, 10945030), (4, 5472515), (5, 4378012), (10, 2189006), (20, 1094503), (53, 413020), (106, 206510), (107, 204580), (193, 113420), (212, 103255), (214, 102290), (265, 82604), (386, 56710), (428, 51145), (530, 41302), (535, 40916), (772, 28355), (965, 22684), (1060, 20651), (1070, 20458), (1930, 11342), (2140, 10229), (3860, 5671)]