20905395

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{103}}^1\times {\mathrm{1933}}^1$

素因数の和:2051

約数の個数: 32

約数和(自身を含む): 38618112

約数和(自身を除く): 17712717

約数列:

[1, 3, 5, 7, 15, 21, 35, 103, 105, 309, 515, 721, 1545, 1933, 2163, 3605, 5799, 9665, 10815, 13531, 28995, 40593, 67655, 199099, 202965, 597297, 995495, 1393693, 2986485, 4181079, 6968465, 20905395]

約数ペア:

[(1, 20905395), (3, 6968465), (5, 4181079), (7, 2986485), (15, 1393693), (21, 995495), (35, 597297), (103, 202965), (105, 199099), (309, 67655), (515, 40593), (721, 28995), (1545, 13531), (1933, 10815), (2163, 9665), (3605, 5799)]