21313287

素因数分解:

$3^5\times {\mathrm{139}}^1\times {\mathrm{631}}^1$

素因数の和:785

約数の個数: 24

約数和(自身を含む): 32206720

約数和(自身を除く): 10893433

約数列:

[1, 3, 9, 27, 81, 139, 243, 417, 631, 1251, 1893, 3753, 5679, 11259, 17037, 33777, 51111, 87709, 153333, 263127, 789381, 2368143, 7104429, 21313287]

約数ペア:

[(1, 21313287), (3, 7104429), (9, 2368143), (27, 789381), (81, 263127), (139, 153333), (243, 87709), (417, 51111), (631, 33777), (1251, 17037), (1893, 11259), (3753, 5679)]