20995765

素因数分解:

$5^1\times 7^2\times {\mathrm{17}}^1\times {\mathrm{71}}^2$

素因数の和:178

約数の個数: 36

約数和(自身を含む): 31475628

約数和(自身を除く): 10479863

約数列:

[1, 5, 7, 17, 35, 49, 71, 85, 119, 245, 355, 497, 595, 833, 1207, 2485, 3479, 4165, 5041, 6035, 8449, 17395, 25205, 35287, 42245, 59143, 85697, 176435, 247009, 295715, 428485, 599879, 1235045, 2999395, 4199153, 20995765]

約数ペア:

[(1, 20995765), (5, 4199153), (7, 2999395), (17, 1235045), (35, 599879), (49, 428485), (71, 295715), (85, 247009), (119, 176435), (245, 85697), (355, 59143), (497, 42245), (595, 35287), (833, 25205), (1207, 17395), (2485, 8449), (3479, 6035), (4165, 5041)]