21717339

素因数分解:

$3^1\times 7^2\times {\mathrm{157}}^1\times {\mathrm{941}}^1$

素因数の和:1115

約数の個数: 24

約数和(自身を含む): 33934608

約数和(自身を除く): 12217269

約数列:

[1, 3, 7, 21, 49, 147, 157, 471, 941, 1099, 2823, 3297, 6587, 7693, 19761, 23079, 46109, 138327, 147737, 443211, 1034159, 3102477, 7239113, 21717339]

約数ペア:

[(1, 21717339), (3, 7239113), (7, 3102477), (21, 1034159), (49, 443211), (147, 147737), (157, 138327), (471, 46109), (941, 23079), (1099, 19761), (2823, 7693), (3297, 6587)]