256686157

素因数分解:

$7^2\times {\mathrm{13}}^2\times {\mathrm{139}}^1\times {\mathrm{223}}^1$

素因数の和:402

約数の個数: 36

約数和(自身を含む): 327116160

約数和(自身を除く): 70430003

約数列:

[1, 7, 13, 49, 91, 139, 169, 223, 637, 973, 1183, 1561, 1807, 2899, 6811, 8281, 10927, 12649, 20293, 23491, 30997, 37687, 88543, 142051, 164437, 216979, 263809, 402961, 1151059, 1518853, 1846663, 2820727, 5238493, 19745089, 36669451, 256686157]

約数ペア:

[(1, 256686157), (7, 36669451), (13, 19745089), (49, 5238493), (91, 2820727), (139, 1846663), (169, 1518853), (223, 1151059), (637, 402961), (973, 263809), (1183, 216979), (1561, 164437), (1807, 142051), (2899, 88543), (6811, 37687), (8281, 30997), (10927, 23491), (12649, 20293)]