12780747

素因数分解:

$3^4\times 7^1\times {\mathrm{22541}}^1$

素因数の和:22560

約数の個数: 20

約数和(自身を含む): 21820656

約数和(自身を除く): 9039909

約数列:

[1, 3, 7, 9, 21, 27, 63, 81, 189, 567, 22541, 67623, 157787, 202869, 473361, 608607, 1420083, 1825821, 4260249, 12780747]

約数ペア:

[(1, 12780747), (3, 4260249), (7, 1825821), (9, 1420083), (21, 608607), (27, 473361), (63, 202869), (81, 157787), (189, 67623), (567, 22541)]