21253239

素因数分解:

$3^3\times 7^1\times {\mathrm{139}}^1\times {\mathrm{809}}^1$

素因数の和:964

約数の個数: 32

約数和(自身を含む): 36288000

約数和(自身を除く): 15034761

約数列:

[1, 3, 7, 9, 21, 27, 63, 139, 189, 417, 809, 973, 1251, 2427, 2919, 3753, 5663, 7281, 8757, 16989, 21843, 26271, 50967, 112451, 152901, 337353, 787157, 1012059, 2361471, 3036177, 7084413, 21253239]

約数ペア:

[(1, 21253239), (3, 7084413), (7, 3036177), (9, 2361471), (21, 1012059), (27, 787157), (63, 337353), (139, 152901), (189, 112451), (417, 50967), (809, 26271), (973, 21843), (1251, 16989), (2427, 8757), (2919, 7281), (3753, 5663)]