81459940

素因数分解:

$2^2\times 5^1\times {\mathrm{31}}^1\times {\mathrm{37}}^1\times {\mathrm{53}}^1\times {\mathrm{67}}^1$

素因数の和:197

約数の個数: 96

約数和(自身を含む): 187536384

約数和(自身を除く): 106076444

約数列:

[1, 2, 4, 5, 10, 20, 31, 37, 53, 62, 67, 74, 106, 124, 134, 148, 155, 185, 212, 265, 268, 310, 335, 370, 530, 620, 670, 740, 1060, 1147, 1340, 1643, 1961, 2077, 2294, 2479, 3286, 3551, 3922, 4154, 4588, 4958, 5735, 6572, 7102, 7844, 8215, 8308, 9805, 9916, 10385, 11470, 12395, 14204, 16430, 17755, 19610, 20770, 22940, 24790, 32860, 35510, 39220, 41540, 49580, 60791, 71020, 76849, 110081, 121582, 131387, 153698, 220162, 243164, 262774, 303955, 307396, 384245, 440324, 525548, 550405, 607910, 656935, 768490, 1100810, 1215820, 1313870, 1536980, 2201620, 2627740, 4072997, 8145994, 16291988, 20364985, 40729970, 81459940]

約数ペア:

[(1, 81459940), (2, 40729970), (4, 20364985), (5, 16291988), (10, 8145994), (20, 4072997), (31, 2627740), (37, 2201620), (53, 1536980), (62, 1313870), (67, 1215820), (74, 1100810), (106, 768490), (124, 656935), (134, 607910), (148, 550405), (155, 525548), (185, 440324), (212, 384245), (265, 307396), (268, 303955), (310, 262774), (335, 243164), (370, 220162), (530, 153698), (620, 131387), (670, 121582), (740, 110081), (1060, 76849), (1147, 71020), (1340, 60791), (1643, 49580), (1961, 41540), (2077, 39220), (2294, 35510), (2479, 32860), (3286, 24790), (3551, 22940), (3922, 20770), (4154, 19610), (4588, 17755), (4958, 16430), (5735, 14204), (6572, 12395), (7102, 11470), (7844, 10385), (8215, 9916), (8308, 9805)]