21220185

素因数分解:

$3^1\times 5^1\times 7^2\times {\mathrm{28871}}^1$

素因数の和:28893

約数の個数: 24

約数和(自身を含む): 39496896

約数和(自身を除く): 18276711

約数列:

[1, 3, 5, 7, 15, 21, 35, 49, 105, 147, 245, 735, 28871, 86613, 144355, 202097, 433065, 606291, 1010485, 1414679, 3031455, 4244037, 7073395, 21220185]

約数ペア:

[(1, 21220185), (3, 7073395), (5, 4244037), (7, 3031455), (15, 1414679), (21, 1010485), (35, 606291), (49, 433065), (105, 202097), (147, 144355), (245, 86613), (735, 28871)]