20749860

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{6781}}^1$

素因数の和:6813

約数の個数: 72

約数和(自身を含む): 66653496

約数和(自身を除く): 45903636

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 17, 18, 20, 30, 34, 36, 45, 51, 60, 68, 85, 90, 102, 153, 170, 180, 204, 255, 306, 340, 510, 612, 765, 1020, 1530, 3060, 6781, 13562, 20343, 27124, 33905, 40686, 61029, 67810, 81372, 101715, 115277, 122058, 135620, 203430, 230554, 244116, 305145, 345831, 406860, 461108, 576385, 610290, 691662, 1037493, 1152770, 1220580, 1383324, 1729155, 2074986, 2305540, 3458310, 4149972, 5187465, 6916620, 10374930, 20749860]

約数ペア:

[(1, 20749860), (2, 10374930), (3, 6916620), (4, 5187465), (5, 4149972), (6, 3458310), (9, 2305540), (10, 2074986), (12, 1729155), (15, 1383324), (17, 1220580), (18, 1152770), (20, 1037493), (30, 691662), (34, 610290), (36, 576385), (45, 461108), (51, 406860), (60, 345831), (68, 305145), (85, 244116), (90, 230554), (102, 203430), (153, 135620), (170, 122058), (180, 115277), (204, 101715), (255, 81372), (306, 67810), (340, 61029), (510, 40686), (612, 33905), (765, 27124), (1020, 20343), (1530, 13562), (3060, 6781)]