78978321

素因数分解:

$3^4\times {\mathrm{53}}^1\times {\mathrm{18397}}^1$

素因数の和:18462

約数の個数: 20

約数和(自身を含む): 120212532

約数和(自身を除く): 41234211

約数列:

[1, 3, 9, 27, 53, 81, 159, 477, 1431, 4293, 18397, 55191, 165573, 496719, 975041, 1490157, 2925123, 8775369, 26326107, 78978321]

約数ペア:

[(1, 78978321), (3, 26326107), (9, 8775369), (27, 2925123), (53, 1490157), (81, 975041), (159, 496719), (477, 165573), (1431, 55191), (4293, 18397)]