21920265

素因数分解:

$3^2\times 5^1\times {\mathrm{23}}^1\times {\mathrm{21179}}^1$

素因数の和:21213

約数の個数: 24

約数和(自身を含む): 39648960

約数和(自身を除く): 17728695

約数列:

[1, 3, 5, 9, 15, 23, 45, 69, 115, 207, 345, 1035, 21179, 63537, 105895, 190611, 317685, 487117, 953055, 1461351, 2435585, 4384053, 7306755, 21920265]

約数ペア:

[(1, 21920265), (3, 7306755), (5, 4384053), (9, 2435585), (15, 1461351), (23, 953055), (45, 487117), (69, 317685), (115, 190611), (207, 105895), (345, 63537), (1035, 21179)]