20992440

素因数分解:

$2^3\times 3^1\times 5^1\times 7^1\times {\mathrm{67}}^1\times {\mathrm{373}}^1$

素因数の和:461

約数の個数: 128

約数和(自身を含む): 73244160

約数和(自身を除く): 52251720

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 15, 20, 21, 24, 28, 30, 35, 40, 42, 56, 60, 67, 70, 84, 105, 120, 134, 140, 168, 201, 210, 268, 280, 335, 373, 402, 420, 469, 536, 670, 746, 804, 840, 938, 1005, 1119, 1340, 1407, 1492, 1608, 1865, 1876, 2010, 2238, 2345, 2611, 2680, 2814, 2984, 3730, 3752, 4020, 4476, 4690, 5222, 5595, 5628, 7035, 7460, 7833, 8040, 8952, 9380, 10444, 11190, 11256, 13055, 14070, 14920, 15666, 18760, 20888, 22380, 24991, 26110, 28140, 31332, 39165, 44760, 49982, 52220, 56280, 62664, 74973, 78330, 99964, 104440, 124955, 149946, 156660, 174937, 199928, 249910, 299892, 313320, 349874, 374865, 499820, 524811, 599784, 699748, 749730, 874685, 999640, 1049622, 1399496, 1499460, 1749370, 2099244, 2624055, 2998920, 3498740, 4198488, 5248110, 6997480, 10496220, 20992440]

約数ペア:

[(1, 20992440), (2, 10496220), (3, 6997480), (4, 5248110), (5, 4198488), (6, 3498740), (7, 2998920), (8, 2624055), (10, 2099244), (12, 1749370), (14, 1499460), (15, 1399496), (20, 1049622), (21, 999640), (24, 874685), (28, 749730), (30, 699748), (35, 599784), (40, 524811), (42, 499820), (56, 374865), (60, 349874), (67, 313320), (70, 299892), (84, 249910), (105, 199928), (120, 174937), (134, 156660), (140, 149946), (168, 124955), (201, 104440), (210, 99964), (268, 78330), (280, 74973), (335, 62664), (373, 56280), (402, 52220), (420, 49982), (469, 44760), (536, 39165), (670, 31332), (746, 28140), (804, 26110), (840, 24991), (938, 22380), (1005, 20888), (1119, 18760), (1340, 15666), (1407, 14920), (1492, 14070), (1608, 13055), (1865, 11256), (1876, 11190), (2010, 10444), (2238, 9380), (2345, 8952), (2611, 8040), (2680, 7833), (2814, 7460), (2984, 7035), (3730, 5628), (3752, 5595), (4020, 5222), (4476, 4690)]