20357421

素因数分解:

$3^1\times 7^1\times {\mathrm{31}}^1\times {\mathrm{31271}}^1$

素因数の和:31312

約数の個数: 16

約数和(自身を含む): 32022528

約数和(自身を除く): 11665107

約数列:

[1, 3, 7, 21, 31, 93, 217, 651, 31271, 93813, 218897, 656691, 969401, 2908203, 6785807, 20357421]

約数ペア:

[(1, 20357421), (3, 6785807), (7, 2908203), (21, 969401), (31, 656691), (93, 218897), (217, 93813), (651, 31271)]