218209545

素因数分解:

$3^4\times 5^1\times {\mathrm{538789}}^1$

素因数の和:538806

約数の個数: 20

約数和(自身を含む): 391161540

約数和(自身を除く): 172951995

約数列:

[1, 3, 5, 9, 15, 27, 45, 81, 135, 405, 538789, 1616367, 2693945, 4849101, 8081835, 14547303, 24245505, 43641909, 72736515, 218209545]

約数ペア:

[(1, 218209545), (3, 72736515), (5, 43641909), (9, 24245505), (15, 14547303), (27, 8081835), (45, 4849101), (81, 2693945), (135, 1616367), (405, 538789)]