131270020

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{133949}}^1$

素因数の和:133972

約数の個数: 36

約数和(自身を含む): 320676300

約数和(自身を除く): 189406280

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 49, 70, 98, 140, 196, 245, 490, 980, 133949, 267898, 535796, 669745, 937643, 1339490, 1875286, 2678980, 3750572, 4688215, 6563501, 9376430, 13127002, 18752860, 26254004, 32817505, 65635010, 131270020]

約数ペア:

[(1, 131270020), (2, 65635010), (4, 32817505), (5, 26254004), (7, 18752860), (10, 13127002), (14, 9376430), (20, 6563501), (28, 4688215), (35, 3750572), (49, 2678980), (70, 1875286), (98, 1339490), (140, 937643), (196, 669745), (245, 535796), (490, 267898), (980, 133949)]