21656960

素因数分解:

$2^7\times 5^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{137}}^1$

素因数の和:188

約数の個数: 128

約数和(自身を含む): 59119200

約数和(自身を除く): 37462240

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 19, 20, 26, 32, 38, 40, 52, 64, 65, 76, 80, 95, 104, 128, 130, 137, 152, 160, 190, 208, 247, 260, 274, 304, 320, 380, 416, 494, 520, 548, 608, 640, 685, 760, 832, 988, 1040, 1096, 1216, 1235, 1370, 1520, 1664, 1781, 1976, 2080, 2192, 2432, 2470, 2603, 2740, 3040, 3562, 3952, 4160, 4384, 4940, 5206, 5480, 6080, 7124, 7904, 8320, 8768, 8905, 9880, 10412, 10960, 12160, 13015, 14248, 15808, 17536, 17810, 19760, 20824, 21920, 26030, 28496, 31616, 33839, 35620, 39520, 41648, 43840, 52060, 56992, 67678, 71240, 79040, 83296, 87680, 104120, 113984, 135356, 142480, 158080, 166592, 169195, 208240, 227968, 270712, 284960, 333184, 338390, 416480, 541424, 569920, 676780, 832960, 1082848, 1139840, 1353560, 1665920, 2165696, 2707120, 4331392, 5414240, 10828480, 21656960]

約数ペア:

[(1, 21656960), (2, 10828480), (4, 5414240), (5, 4331392), (8, 2707120), (10, 2165696), (13, 1665920), (16, 1353560), (19, 1139840), (20, 1082848), (26, 832960), (32, 676780), (38, 569920), (40, 541424), (52, 416480), (64, 338390), (65, 333184), (76, 284960), (80, 270712), (95, 227968), (104, 208240), (128, 169195), (130, 166592), (137, 158080), (152, 142480), (160, 135356), (190, 113984), (208, 104120), (247, 87680), (260, 83296), (274, 79040), (304, 71240), (320, 67678), (380, 56992), (416, 52060), (494, 43840), (520, 41648), (548, 39520), (608, 35620), (640, 33839), (685, 31616), (760, 28496), (832, 26030), (988, 21920), (1040, 20824), (1096, 19760), (1216, 17810), (1235, 17536), (1370, 15808), (1520, 14248), (1664, 13015), (1781, 12160), (1976, 10960), (2080, 10412), (2192, 9880), (2432, 8905), (2470, 8768), (2603, 8320), (2740, 7904), (3040, 7124), (3562, 6080), (3952, 5480), (4160, 5206), (4384, 4940)]