220777557

素因数分解:

$3^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{37}}^1\times {\mathrm{1987}}^1$

素因数の和:2058

約数の個数: 64

約数和(自身を含む): 406124544

約数和(自身を除く): 185346987

約数列:

[1, 3, 7, 11, 13, 21, 33, 37, 39, 77, 91, 111, 143, 231, 259, 273, 407, 429, 481, 777, 1001, 1221, 1443, 1987, 2849, 3003, 3367, 5291, 5961, 8547, 10101, 13909, 15873, 21857, 25831, 37037, 41727, 65571, 73519, 77493, 111111, 152999, 180817, 220557, 284141, 458997, 514633, 542451, 808709, 852423, 955747, 1543899, 1988987, 2426127, 2867241, 5660963, 5966961, 6690229, 10513217, 16982889, 20070687, 31539651, 73592519, 220777557]

約数ペア:

[(1, 220777557), (3, 73592519), (7, 31539651), (11, 20070687), (13, 16982889), (21, 10513217), (33, 6690229), (37, 5966961), (39, 5660963), (77, 2867241), (91, 2426127), (111, 1988987), (143, 1543899), (231, 955747), (259, 852423), (273, 808709), (407, 542451), (429, 514633), (481, 458997), (777, 284141), (1001, 220557), (1221, 180817), (1443, 152999), (1987, 111111), (2849, 77493), (3003, 73519), (3367, 65571), (5291, 41727), (5961, 37037), (8547, 25831), (10101, 21857), (13909, 15873)]