21280722

素因数分解:

$2^1\times 3^1\times {\mathrm{19}}^1\times {\mathrm{29}}^1\times {\mathrm{41}}^1\times {\mathrm{157}}^1$

素因数の和:251

約数の個数: 64

約数和(自身を含む): 47779200

約数和(自身を除く): 26498478

約数列:

[1, 2, 3, 6, 19, 29, 38, 41, 57, 58, 82, 87, 114, 123, 157, 174, 246, 314, 471, 551, 779, 942, 1102, 1189, 1558, 1653, 2337, 2378, 2983, 3306, 3567, 4553, 4674, 5966, 6437, 7134, 8949, 9106, 12874, 13659, 17898, 19311, 22591, 27318, 38622, 45182, 67773, 86507, 122303, 135546, 173014, 186673, 244606, 259521, 366909, 373346, 519042, 560019, 733818, 1120038, 3546787, 7093574, 10640361, 21280722]

約数ペア:

[(1, 21280722), (2, 10640361), (3, 7093574), (6, 3546787), (19, 1120038), (29, 733818), (38, 560019), (41, 519042), (57, 373346), (58, 366909), (82, 259521), (87, 244606), (114, 186673), (123, 173014), (157, 135546), (174, 122303), (246, 86507), (314, 67773), (471, 45182), (551, 38622), (779, 27318), (942, 22591), (1102, 19311), (1189, 17898), (1558, 13659), (1653, 12874), (2337, 9106), (2378, 8949), (2983, 7134), (3306, 6437), (3567, 5966), (4553, 4674)]