20719140

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{101}}^1\times {\mathrm{263}}^1$

素因数の和:389

約数の個数: 96

約数和(自身を含む): 63334656

約数和(自身を除く): 42615516

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 13, 15, 20, 26, 30, 39, 52, 60, 65, 78, 101, 130, 156, 195, 202, 260, 263, 303, 390, 404, 505, 526, 606, 780, 789, 1010, 1052, 1212, 1313, 1315, 1515, 1578, 2020, 2626, 2630, 3030, 3156, 3419, 3939, 3945, 5252, 5260, 6060, 6565, 6838, 7878, 7890, 10257, 13130, 13676, 15756, 15780, 17095, 19695, 20514, 26260, 26563, 34190, 39390, 41028, 51285, 53126, 68380, 78780, 79689, 102570, 106252, 132815, 159378, 205140, 265630, 318756, 345319, 398445, 531260, 690638, 796890, 1035957, 1381276, 1593780, 1726595, 2071914, 3453190, 4143828, 5179785, 6906380, 10359570, 20719140]

約数ペア:

[(1, 20719140), (2, 10359570), (3, 6906380), (4, 5179785), (5, 4143828), (6, 3453190), (10, 2071914), (12, 1726595), (13, 1593780), (15, 1381276), (20, 1035957), (26, 796890), (30, 690638), (39, 531260), (52, 398445), (60, 345319), (65, 318756), (78, 265630), (101, 205140), (130, 159378), (156, 132815), (195, 106252), (202, 102570), (260, 79689), (263, 78780), (303, 68380), (390, 53126), (404, 51285), (505, 41028), (526, 39390), (606, 34190), (780, 26563), (789, 26260), (1010, 20514), (1052, 19695), (1212, 17095), (1313, 15780), (1315, 15756), (1515, 13676), (1578, 13130), (2020, 10257), (2626, 7890), (2630, 7878), (3030, 6838), (3156, 6565), (3419, 6060), (3939, 5260), (3945, 5252)]