21749307951

素因数分解:

$3^1\times 7^1\times {\mathrm{47}}^1\times {\mathrm{71}}^1\times {\mathrm{310363}}^1$

素因数の和:310491

約数の個数: 32

約数和(自身を含む): 34323775488

約数和(自身を除く): 12574467537

約数列:

[1, 3, 7, 21, 47, 71, 141, 213, 329, 497, 987, 1491, 3337, 10011, 23359, 70077, 310363, 931089, 2172541, 6517623, 14587061, 22035773, 43761183, 66107319, 102109427, 154250411, 306328281, 462751233, 1035681331, 3107043993, 7249769317, 21749307951]

約数ペア:

[(1, 21749307951), (3, 7249769317), (7, 3107043993), (21, 1035681331), (47, 462751233), (71, 306328281), (141, 154250411), (213, 102109427), (329, 66107319), (497, 43761183), (987, 22035773), (1491, 14587061), (3337, 6517623), (10011, 2172541), (23359, 931089), (70077, 310363)]