20668140

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{199}}^1\times {\mathrm{577}}^1$

素因数の和:791

約数の個数: 72

約数和(自身を含む): 63117600

約数和(自身を除く): 42449460

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 30, 36, 45, 60, 90, 180, 199, 398, 577, 597, 796, 995, 1154, 1194, 1731, 1791, 1990, 2308, 2388, 2885, 2985, 3462, 3582, 3980, 5193, 5770, 5970, 6924, 7164, 8655, 8955, 10386, 11540, 11940, 17310, 17910, 20772, 25965, 34620, 35820, 51930, 103860, 114823, 229646, 344469, 459292, 574115, 688938, 1033407, 1148230, 1377876, 1722345, 2066814, 2296460, 3444690, 4133628, 5167035, 6889380, 10334070, 20668140]

約数ペア:

[(1, 20668140), (2, 10334070), (3, 6889380), (4, 5167035), (5, 4133628), (6, 3444690), (9, 2296460), (10, 2066814), (12, 1722345), (15, 1377876), (18, 1148230), (20, 1033407), (30, 688938), (36, 574115), (45, 459292), (60, 344469), (90, 229646), (180, 114823), (199, 103860), (398, 51930), (577, 35820), (597, 34620), (796, 25965), (995, 20772), (1154, 17910), (1194, 17310), (1731, 11940), (1791, 11540), (1990, 10386), (2308, 8955), (2388, 8655), (2885, 7164), (2985, 6924), (3462, 5970), (3582, 5770), (3980, 5193)]