21471885

素因数分解:

$3^4\times 5^1\times {\mathrm{53017}}^1$

素因数の和:53034

約数の個数: 20

約数和(自身を含む): 38491068

約数和(自身を除く): 17019183

約数列:

[1, 3, 5, 9, 15, 27, 45, 81, 135, 405, 53017, 159051, 265085, 477153, 795255, 1431459, 2385765, 4294377, 7157295, 21471885]

約数ペア:

[(1, 21471885), (3, 7157295), (5, 4294377), (9, 2385765), (15, 1431459), (27, 795255), (45, 477153), (81, 265085), (135, 159051), (405, 53017)]