20906820

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{10559}}^1$

素因数の和:10585

約数の個数: 72

約数和(自身を含む): 69189120

約数和(自身を除く): 48282300

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 11, 12, 15, 18, 20, 22, 30, 33, 36, 44, 45, 55, 60, 66, 90, 99, 110, 132, 165, 180, 198, 220, 330, 396, 495, 660, 990, 1980, 10559, 21118, 31677, 42236, 52795, 63354, 95031, 105590, 116149, 126708, 158385, 190062, 211180, 232298, 316770, 348447, 380124, 464596, 475155, 580745, 633540, 696894, 950310, 1045341, 1161490, 1393788, 1742235, 1900620, 2090682, 2322980, 3484470, 4181364, 5226705, 6968940, 10453410, 20906820]

約数ペア:

[(1, 20906820), (2, 10453410), (3, 6968940), (4, 5226705), (5, 4181364), (6, 3484470), (9, 2322980), (10, 2090682), (11, 1900620), (12, 1742235), (15, 1393788), (18, 1161490), (20, 1045341), (22, 950310), (30, 696894), (33, 633540), (36, 580745), (44, 475155), (45, 464596), (55, 380124), (60, 348447), (66, 316770), (90, 232298), (99, 211180), (110, 190062), (132, 158385), (165, 126708), (180, 116149), (198, 105590), (220, 95031), (330, 63354), (396, 52795), (495, 42236), (660, 31677), (990, 21118), (1980, 10559)]