21069639

素因数分解:

$3^4\times {\mathrm{467}}^1\times {\mathrm{557}}^1$

素因数の和:1036

約数の個数: 20

約数和(自身を含む): 31598424

約数和(自身を除く): 10528785

約数列:

[1, 3, 9, 27, 81, 467, 557, 1401, 1671, 4203, 5013, 12609, 15039, 37827, 45117, 260119, 780357, 2341071, 7023213, 21069639]

約数ペア:

[(1, 21069639), (3, 7023213), (9, 2341071), (27, 780357), (81, 260119), (467, 45117), (557, 37827), (1401, 15039), (1671, 12609), (4203, 5013)]