28261980

素因数分解:

$2^2\times 3^3\times 5^1\times {\mathrm{199}}^1\times {\mathrm{263}}^1$

素因数の和:480

約数の個数: 96

約数和(自身を含む): 88704000

約数和(自身を除く): 60442020

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 27, 30, 36, 45, 54, 60, 90, 108, 135, 180, 199, 263, 270, 398, 526, 540, 597, 789, 796, 995, 1052, 1194, 1315, 1578, 1791, 1990, 2367, 2388, 2630, 2985, 3156, 3582, 3945, 3980, 4734, 5260, 5373, 5970, 7101, 7164, 7890, 8955, 9468, 10746, 11835, 11940, 14202, 15780, 17910, 21492, 23670, 26865, 28404, 35505, 35820, 47340, 52337, 53730, 71010, 104674, 107460, 142020, 157011, 209348, 261685, 314022, 471033, 523370, 628044, 785055, 942066, 1046740, 1413099, 1570110, 1884132, 2355165, 2826198, 3140220, 4710330, 5652396, 7065495, 9420660, 14130990, 28261980]

約数ペア:

[(1, 28261980), (2, 14130990), (3, 9420660), (4, 7065495), (5, 5652396), (6, 4710330), (9, 3140220), (10, 2826198), (12, 2355165), (15, 1884132), (18, 1570110), (20, 1413099), (27, 1046740), (30, 942066), (36, 785055), (45, 628044), (54, 523370), (60, 471033), (90, 314022), (108, 261685), (135, 209348), (180, 157011), (199, 142020), (263, 107460), (270, 104674), (398, 71010), (526, 53730), (540, 52337), (597, 47340), (789, 35820), (796, 35505), (995, 28404), (1052, 26865), (1194, 23670), (1315, 21492), (1578, 17910), (1791, 15780), (1990, 14202), (2367, 11940), (2388, 11835), (2630, 10746), (2985, 9468), (3156, 8955), (3582, 7890), (3945, 7164), (3980, 7101), (4734, 5970), (5260, 5373)]