18970791

素因数分解:

$3^1\times 7^2\times {\mathrm{23}}^1\times {\mathrm{31}}^1\times {\mathrm{181}}^1$

素因数の和:252

約数の個数: 48

約数和(自身を含む): 31868928

約数和(自身を除く): 12898137

約数列:

[1, 3, 7, 21, 23, 31, 49, 69, 93, 147, 161, 181, 217, 483, 543, 651, 713, 1127, 1267, 1519, 2139, 3381, 3801, 4163, 4557, 4991, 5611, 8869, 12489, 14973, 16833, 26607, 29141, 34937, 39277, 87423, 104811, 117831, 129053, 203987, 274939, 387159, 611961, 824817, 903371, 2710113, 6323597, 18970791]

約数ペア:

[(1, 18970791), (3, 6323597), (7, 2710113), (21, 903371), (23, 824817), (31, 611961), (49, 387159), (69, 274939), (93, 203987), (147, 129053), (161, 117831), (181, 104811), (217, 87423), (483, 39277), (543, 34937), (651, 29141), (713, 26607), (1127, 16833), (1267, 14973), (1519, 12489), (2139, 8869), (3381, 5611), (3801, 4991), (4163, 4557)]