20808904

素因数分解:

$2^3\times {\mathrm{43}}^1\times {\mathrm{241}}^1\times {\mathrm{251}}^1$

素因数の和:541

約数の個数: 32

約数和(自身を含む): 40249440

約数和(自身を除く): 19440536

約数列:

[1, 2, 4, 8, 43, 86, 172, 241, 251, 344, 482, 502, 964, 1004, 1928, 2008, 10363, 10793, 20726, 21586, 41452, 43172, 60491, 82904, 86344, 120982, 241964, 483928, 2601113, 5202226, 10404452, 20808904]

約数ペア:

[(1, 20808904), (2, 10404452), (4, 5202226), (8, 2601113), (43, 483928), (86, 241964), (172, 120982), (241, 86344), (251, 82904), (344, 60491), (482, 43172), (502, 41452), (964, 21586), (1004, 20726), (1928, 10793), (2008, 10363)]