21561407

素因数分解:

$7^1\times {\mathrm{53}}^1\times {\mathrm{89}}^1\times {\mathrm{653}}^1$

素因数の和:802

約数の個数: 16

約数和(自身を含む): 25427520

約数和(自身を除く): 3866113

約数列:

[1, 7, 53, 89, 371, 623, 653, 4571, 4717, 33019, 34609, 58117, 242263, 406819, 3080201, 21561407]

約数ペア:

[(1, 21561407), (7, 3080201), (53, 406819), (89, 242263), (371, 58117), (623, 34609), (653, 33019), (4571, 4717)]