20681557

素因数分解:

${\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{31}}^1\times {\mathrm{37}}^1\times {\mathrm{73}}^1$

素因数の和:173

約数の個数: 32

約数和(自身を含む): 25195520

約数和(自身を除く): 4513963

約数列:

[1, 13, 19, 31, 37, 73, 247, 403, 481, 589, 703, 949, 1147, 1387, 2263, 2701, 7657, 9139, 14911, 18031, 21793, 29419, 35113, 42997, 51319, 83731, 283309, 558961, 667147, 1088503, 1590889, 20681557]

約数ペア:

[(1, 20681557), (13, 1590889), (19, 1088503), (31, 667147), (37, 558961), (73, 283309), (247, 83731), (403, 51319), (481, 42997), (589, 35113), (703, 29419), (949, 21793), (1147, 18031), (1387, 14911), (2263, 9139), (2701, 7657)]