20906403

素因数分解:

$3^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{151}}^1\times {\mathrm{347}}^1$

素因数の和:527

約数の個数: 32

約数和(自身を含む): 33853440

約数和(自身を除く): 12947037

約数列:

[1, 3, 7, 19, 21, 57, 133, 151, 347, 399, 453, 1041, 1057, 2429, 2869, 3171, 6593, 7287, 8607, 19779, 20083, 46151, 52397, 60249, 138453, 157191, 366779, 995543, 1100337, 2986629, 6968801, 20906403]

約数ペア:

[(1, 20906403), (3, 6968801), (7, 2986629), (19, 1100337), (21, 995543), (57, 366779), (133, 157191), (151, 138453), (347, 60249), (399, 52397), (453, 46151), (1041, 20083), (1057, 19779), (2429, 8607), (2869, 7287), (3171, 6593)]