78800020

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{199}}^1\times {\mathrm{1523}}^1$

素因数の和:1744

約数の個数: 48

約数和(自身を含む): 179222400

約数和(自身を除く): 100422380

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 199, 260, 398, 796, 995, 1523, 1990, 2587, 3046, 3980, 5174, 6092, 7615, 10348, 12935, 15230, 19799, 25870, 30460, 39598, 51740, 79196, 98995, 197990, 303077, 395980, 606154, 1212308, 1515385, 3030770, 3940001, 6061540, 7880002, 15760004, 19700005, 39400010, 78800020]

約数ペア:

[(1, 78800020), (2, 39400010), (4, 19700005), (5, 15760004), (10, 7880002), (13, 6061540), (20, 3940001), (26, 3030770), (52, 1515385), (65, 1212308), (130, 606154), (199, 395980), (260, 303077), (398, 197990), (796, 98995), (995, 79196), (1523, 51740), (1990, 39598), (2587, 30460), (3046, 25870), (3980, 19799), (5174, 15230), (6092, 12935), (7615, 10348)]