21957885

素因数分解:

$3^4\times 5^1\times {\mathrm{54217}}^1$

素因数の和:54234

約数の個数: 20

約数和(自身を含む): 39362268

約数和(自身を除く): 17404383

約数列:

[1, 3, 5, 9, 15, 27, 45, 81, 135, 405, 54217, 162651, 271085, 487953, 813255, 1463859, 2439765, 4391577, 7319295, 21957885]

約数ペア:

[(1, 21957885), (3, 7319295), (5, 4391577), (9, 2439765), (15, 1463859), (27, 813255), (45, 487953), (81, 271085), (135, 162651), (405, 54217)]