21031143

素因数分解:

$3^1\times 7^2\times {\mathrm{79}}^1\times {\mathrm{1811}}^1$

素因数の和:1907

約数の個数: 24

約数和(自身を含む): 33050880

約数和(自身を除く): 12019737

約数列:

[1, 3, 7, 21, 49, 79, 147, 237, 553, 1659, 1811, 3871, 5433, 11613, 12677, 38031, 88739, 143069, 266217, 429207, 1001483, 3004449, 7010381, 21031143]

約数ペア:

[(1, 21031143), (3, 7010381), (7, 3004449), (21, 1001483), (49, 429207), (79, 266217), (147, 143069), (237, 88739), (553, 38031), (1659, 12677), (1811, 11613), (3871, 5433)]