21677880

素因数分解:

$2^3\times 3^1\times 5^1\times 7^1\times {\mathrm{131}}^1\times {\mathrm{197}}^1$

素因数の和:349

約数の個数: 128

約数和(自身を含む): 75271680

約数和(自身を除く): 53593800

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, 70, 84, 105, 120, 131, 140, 168, 197, 210, 262, 280, 393, 394, 420, 524, 591, 655, 786, 788, 840, 917, 985, 1048, 1182, 1310, 1379, 1572, 1576, 1834, 1965, 1970, 2364, 2620, 2751, 2758, 2955, 3144, 3668, 3930, 3940, 4137, 4585, 4728, 5240, 5502, 5516, 5910, 6895, 7336, 7860, 7880, 8274, 9170, 11004, 11032, 11820, 13755, 13790, 15720, 16548, 18340, 20685, 22008, 23640, 25807, 27510, 27580, 33096, 36680, 41370, 51614, 55020, 55160, 77421, 82740, 103228, 110040, 129035, 154842, 165480, 180649, 206456, 258070, 309684, 361298, 387105, 516140, 541947, 619368, 722596, 774210, 903245, 1032280, 1083894, 1445192, 1548420, 1806490, 2167788, 2709735, 3096840, 3612980, 4335576, 5419470, 7225960, 10838940, 21677880]

約数ペア:

[(1, 21677880), (2, 10838940), (3, 7225960), (4, 5419470), (5, 4335576), (6, 3612980), (7, 3096840), (8, 2709735), (10, 2167788), (12, 1806490), (14, 1548420), (15, 1445192), (20, 1083894), (21, 1032280), (24, 903245), (28, 774210), (30, 722596), (35, 619368), (40, 541947), (42, 516140), (56, 387105), (60, 361298), (70, 309684), (84, 258070), (105, 206456), (120, 180649), (131, 165480), (140, 154842), (168, 129035), (197, 110040), (210, 103228), (262, 82740), (280, 77421), (393, 55160), (394, 55020), (420, 51614), (524, 41370), (591, 36680), (655, 33096), (786, 27580), (788, 27510), (840, 25807), (917, 23640), (985, 22008), (1048, 20685), (1182, 18340), (1310, 16548), (1379, 15720), (1572, 13790), (1576, 13755), (1834, 11820), (1965, 11032), (1970, 11004), (2364, 9170), (2620, 8274), (2751, 7880), (2758, 7860), (2955, 7336), (3144, 6895), (3668, 5910), (3930, 5516), (3940, 5502), (4137, 5240), (4585, 4728)]