20565993968

素因数分解:

$2^4\times {\mathrm{13}}^3\times {\mathrm{401}}^1\times {\mathrm{1459}}^1$

素因数の和:1907

約数の個数: 80

約数和(自身を含む): 43302957600

約数和(自身を除く): 22736963632

約数列:

[1, 2, 4, 8, 13, 16, 26, 52, 104, 169, 208, 338, 401, 676, 802, 1352, 1459, 1604, 2197, 2704, 2918, 3208, 4394, 5213, 5836, 6416, 8788, 10426, 11672, 17576, 18967, 20852, 23344, 35152, 37934, 41704, 67769, 75868, 83408, 135538, 151736, 246571, 271076, 303472, 493142, 542152, 585059, 880997, 986284, 1084304, 1170118, 1761994, 1972568, 2340236, 3205423, 3523988, 3945136, 4680472, 6410846, 7047976, 7605767, 9360944, 12821692, 14095952, 15211534, 25643384, 30423068, 51286768, 60846136, 98874971, 121692272, 197749942, 395499884, 790999768, 1285374623, 1581999536, 2570749246, 5141498492, 10282996984, 20565993968]

約数ペア:

[(1, 20565993968), (2, 10282996984), (4, 5141498492), (8, 2570749246), (13, 1581999536), (16, 1285374623), (26, 790999768), (52, 395499884), (104, 197749942), (169, 121692272), (208, 98874971), (338, 60846136), (401, 51286768), (676, 30423068), (802, 25643384), (1352, 15211534), (1459, 14095952), (1604, 12821692), (2197, 9360944), (2704, 7605767), (2918, 7047976), (3208, 6410846), (4394, 4680472), (5213, 3945136), (5836, 3523988), (6416, 3205423), (8788, 2340236), (10426, 1972568), (11672, 1761994), (17576, 1170118), (18967, 1084304), (20852, 986284), (23344, 880997), (35152, 585059), (37934, 542152), (41704, 493142), (67769, 303472), (75868, 271076), (83408, 246571), (135538, 151736)]