20747740

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{199}}^1\times {\mathrm{401}}^1$

素因数の和:622

約数の個数: 48

約数和(自身を含む): 47275200

約数和(自身を除く): 26527460

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 199, 260, 398, 401, 796, 802, 995, 1604, 1990, 2005, 2587, 3980, 4010, 5174, 5213, 8020, 10348, 10426, 12935, 20852, 25870, 26065, 51740, 52130, 79799, 104260, 159598, 319196, 398995, 797990, 1037387, 1595980, 2074774, 4149548, 5186935, 10373870, 20747740]

約数ペア:

[(1, 20747740), (2, 10373870), (4, 5186935), (5, 4149548), (10, 2074774), (13, 1595980), (20, 1037387), (26, 797990), (52, 398995), (65, 319196), (130, 159598), (199, 104260), (260, 79799), (398, 52130), (401, 51740), (796, 26065), (802, 25870), (995, 20852), (1604, 12935), (1990, 10426), (2005, 10348), (2587, 8020), (3980, 5213), (4010, 5174)]