21988743

素因数分解:

$3^1\times 7^1\times {\mathrm{131}}^1\times {\mathrm{7993}}^1$

素因数の和:8134

約数の個数: 16

約数和(自身を含む): 33766656

約数和(自身を除く): 11777913

約数列:

[1, 3, 7, 21, 131, 393, 917, 2751, 7993, 23979, 55951, 167853, 1047083, 3141249, 7329581, 21988743]

約数ペア:

[(1, 21988743), (3, 7329581), (7, 3141249), (21, 1047083), (131, 167853), (393, 55951), (917, 23979), (2751, 7993)]