21137055

素因数分解:

$3^1\times 5^1\times {\mathrm{71}}^1\times {\mathrm{89}}^1\times {\mathrm{223}}^1$

素因数の和:391

約数の個数: 32

約数和(自身を含む): 34836480

約数和(自身を除く): 13699425

約数列:

[1, 3, 5, 15, 71, 89, 213, 223, 267, 355, 445, 669, 1065, 1115, 1335, 3345, 6319, 15833, 18957, 19847, 31595, 47499, 59541, 79165, 94785, 99235, 237495, 297705, 1409137, 4227411, 7045685, 21137055]

約数ペア:

[(1, 21137055), (3, 7045685), (5, 4227411), (15, 1409137), (71, 297705), (89, 237495), (213, 99235), (223, 94785), (267, 79165), (355, 59541), (445, 47499), (669, 31595), (1065, 19847), (1115, 18957), (1335, 15833), (3345, 6319)]