21178560

素因数分解:

$2^6\times 3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{1697}}^1$

素因数の和:1730

約数の個数: 112

約数和(自身を含む): 72457056

約数和(自身を除く): 51278496

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 13, 15, 16, 20, 24, 26, 30, 32, 39, 40, 48, 52, 60, 64, 65, 78, 80, 96, 104, 120, 130, 156, 160, 192, 195, 208, 240, 260, 312, 320, 390, 416, 480, 520, 624, 780, 832, 960, 1040, 1248, 1560, 1697, 2080, 2496, 3120, 3394, 4160, 5091, 6240, 6788, 8485, 10182, 12480, 13576, 16970, 20364, 22061, 25455, 27152, 33940, 40728, 44122, 50910, 54304, 66183, 67880, 81456, 88244, 101820, 108608, 110305, 132366, 135760, 162912, 176488, 203640, 220610, 264732, 271520, 325824, 330915, 352976, 407280, 441220, 529464, 543040, 661830, 705952, 814560, 882440, 1058928, 1323660, 1411904, 1629120, 1764880, 2117856, 2647320, 3529760, 4235712, 5294640, 7059520, 10589280, 21178560]

約数ペア:

[(1, 21178560), (2, 10589280), (3, 7059520), (4, 5294640), (5, 4235712), (6, 3529760), (8, 2647320), (10, 2117856), (12, 1764880), (13, 1629120), (15, 1411904), (16, 1323660), (20, 1058928), (24, 882440), (26, 814560), (30, 705952), (32, 661830), (39, 543040), (40, 529464), (48, 441220), (52, 407280), (60, 352976), (64, 330915), (65, 325824), (78, 271520), (80, 264732), (96, 220610), (104, 203640), (120, 176488), (130, 162912), (156, 135760), (160, 132366), (192, 110305), (195, 108608), (208, 101820), (240, 88244), (260, 81456), (312, 67880), (320, 66183), (390, 54304), (416, 50910), (480, 44122), (520, 40728), (624, 33940), (780, 27152), (832, 25455), (960, 22061), (1040, 20364), (1248, 16970), (1560, 13576), (1697, 12480), (2080, 10182), (2496, 8485), (3120, 6788), (3394, 6240), (4160, 5091)]