21005187

素因数分解:

$3^1\times 7^1\times {\mathrm{23}}^1\times {\mathrm{157}}^1\times {\mathrm{277}}^1$

素因数の和:467

約数の個数: 32

約数和(自身を含む): 33733632

約数和(自身を除く): 12728445

約数列:

[1, 3, 7, 21, 23, 69, 157, 161, 277, 471, 483, 831, 1099, 1939, 3297, 3611, 5817, 6371, 10833, 19113, 25277, 43489, 44597, 75831, 130467, 133791, 304423, 913269, 1000247, 3000741, 7001729, 21005187]

約数ペア:

[(1, 21005187), (3, 7001729), (7, 3000741), (21, 1000247), (23, 913269), (69, 304423), (157, 133791), (161, 130467), (277, 75831), (471, 44597), (483, 43489), (831, 25277), (1099, 19113), (1939, 10833), (3297, 6371), (3611, 5817)]