21395880

素因数分解:

$2^3\times 3^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{1801}}^1$

素因数の和:1832

約数の個数: 128

約数和(自身を含む): 77846400

約数和(自身を除く): 56450520

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 11, 12, 15, 18, 20, 22, 24, 27, 30, 33, 36, 40, 44, 45, 54, 55, 60, 66, 72, 88, 90, 99, 108, 110, 120, 132, 135, 165, 180, 198, 216, 220, 264, 270, 297, 330, 360, 396, 440, 495, 540, 594, 660, 792, 990, 1080, 1188, 1320, 1485, 1801, 1980, 2376, 2970, 3602, 3960, 5403, 5940, 7204, 9005, 10806, 11880, 14408, 16209, 18010, 19811, 21612, 27015, 32418, 36020, 39622, 43224, 48627, 54030, 59433, 64836, 72040, 79244, 81045, 97254, 99055, 108060, 118866, 129672, 158488, 162090, 178299, 194508, 198110, 216120, 237732, 243135, 297165, 324180, 356598, 389016, 396220, 475464, 486270, 534897, 594330, 648360, 713196, 792440, 891495, 972540, 1069794, 1188660, 1426392, 1782990, 1945080, 2139588, 2377320, 2674485, 3565980, 4279176, 5348970, 7131960, 10697940, 21395880]

約数ペア:

[(1, 21395880), (2, 10697940), (3, 7131960), (4, 5348970), (5, 4279176), (6, 3565980), (8, 2674485), (9, 2377320), (10, 2139588), (11, 1945080), (12, 1782990), (15, 1426392), (18, 1188660), (20, 1069794), (22, 972540), (24, 891495), (27, 792440), (30, 713196), (33, 648360), (36, 594330), (40, 534897), (44, 486270), (45, 475464), (54, 396220), (55, 389016), (60, 356598), (66, 324180), (72, 297165), (88, 243135), (90, 237732), (99, 216120), (108, 198110), (110, 194508), (120, 178299), (132, 162090), (135, 158488), (165, 129672), (180, 118866), (198, 108060), (216, 99055), (220, 97254), (264, 81045), (270, 79244), (297, 72040), (330, 64836), (360, 59433), (396, 54030), (440, 48627), (495, 43224), (540, 39622), (594, 36020), (660, 32418), (792, 27015), (990, 21612), (1080, 19811), (1188, 18010), (1320, 16209), (1485, 14408), (1801, 11880), (1980, 10806), (2376, 9005), (2970, 7204), (3602, 5940), (3960, 5403)]