217687491

素因数分解:

$3^2\times 7^1\times {\mathrm{41}}^1\times {\mathrm{71}}^1\times {\mathrm{1187}}^1$

素因数の和:1312

約数の個数: 48

約数和(自身を含む): 373621248

約数和(自身を除く): 155933757

約数列:

[1, 3, 7, 9, 21, 41, 63, 71, 123, 213, 287, 369, 497, 639, 861, 1187, 1491, 2583, 2911, 3561, 4473, 8309, 8733, 10683, 20377, 24927, 26199, 48667, 61131, 74781, 84277, 146001, 183393, 252831, 340669, 438003, 589939, 758493, 1022007, 1769817, 3066021, 3455357, 5309451, 10366071, 24187499, 31098213, 72562497, 217687491]

約数ペア:

[(1, 217687491), (3, 72562497), (7, 31098213), (9, 24187499), (21, 10366071), (41, 5309451), (63, 3455357), (71, 3066021), (123, 1769817), (213, 1022007), (287, 758493), (369, 589939), (497, 438003), (639, 340669), (861, 252831), (1187, 183393), (1491, 146001), (2583, 84277), (2911, 74781), (3561, 61131), (4473, 48667), (8309, 26199), (8733, 24927), (10683, 20377)]