20664704

素因数分解:

$2^7\times {\mathrm{19}}^1\times {\mathrm{29}}^1\times {\mathrm{293}}^1$

素因数の和:355

約数の個数: 64

約数和(自身を含む): 44982000

約数和(自身を除く): 24317296

約数列:

[1, 2, 4, 8, 16, 19, 29, 32, 38, 58, 64, 76, 116, 128, 152, 232, 293, 304, 464, 551, 586, 608, 928, 1102, 1172, 1216, 1856, 2204, 2344, 2432, 3712, 4408, 4688, 5567, 8497, 8816, 9376, 11134, 16994, 17632, 18752, 22268, 33988, 35264, 37504, 44536, 67976, 70528, 89072, 135952, 161443, 178144, 271904, 322886, 356288, 543808, 645772, 712576, 1087616, 1291544, 2583088, 5166176, 10332352, 20664704]

約数ペア:

[(1, 20664704), (2, 10332352), (4, 5166176), (8, 2583088), (16, 1291544), (19, 1087616), (29, 712576), (32, 645772), (38, 543808), (58, 356288), (64, 322886), (76, 271904), (116, 178144), (128, 161443), (152, 135952), (232, 89072), (293, 70528), (304, 67976), (464, 44536), (551, 37504), (586, 35264), (608, 33988), (928, 22268), (1102, 18752), (1172, 17632), (1216, 16994), (1856, 11134), (2204, 9376), (2344, 8816), (2432, 8497), (3712, 5567), (4408, 4688)]