20777421

素因数分解:

$3^1\times 7^2\times {\mathrm{281}}^1\times {\mathrm{503}}^1$

素因数の和:801

約数の個数: 24

約数和(自身を含む): 32405184

約数和(自身を除く): 11627763

約数列:

[1, 3, 7, 21, 49, 147, 281, 503, 843, 1509, 1967, 3521, 5901, 10563, 13769, 24647, 41307, 73941, 141343, 424029, 989401, 2968203, 6925807, 20777421]

約数ペア:

[(1, 20777421), (3, 6925807), (7, 2968203), (21, 989401), (49, 424029), (147, 141343), (281, 73941), (503, 41307), (843, 24647), (1509, 13769), (1967, 10563), (3521, 5901)]