21189960

素因数分解:

$2^3\times 3^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{5351}}^1$

素因数の和:5379

約数の個数: 96

約数和(自身を含む): 75142080

約数和(自身を除く): 53952120

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 11, 12, 15, 18, 20, 22, 24, 30, 33, 36, 40, 44, 45, 55, 60, 66, 72, 88, 90, 99, 110, 120, 132, 165, 180, 198, 220, 264, 330, 360, 396, 440, 495, 660, 792, 990, 1320, 1980, 3960, 5351, 10702, 16053, 21404, 26755, 32106, 42808, 48159, 53510, 58861, 64212, 80265, 96318, 107020, 117722, 128424, 160530, 176583, 192636, 214040, 235444, 240795, 294305, 321060, 353166, 385272, 470888, 481590, 529749, 588610, 642120, 706332, 882915, 963180, 1059498, 1177220, 1412664, 1765830, 1926360, 2118996, 2354440, 2648745, 3531660, 4237992, 5297490, 7063320, 10594980, 21189960]

約数ペア:

[(1, 21189960), (2, 10594980), (3, 7063320), (4, 5297490), (5, 4237992), (6, 3531660), (8, 2648745), (9, 2354440), (10, 2118996), (11, 1926360), (12, 1765830), (15, 1412664), (18, 1177220), (20, 1059498), (22, 963180), (24, 882915), (30, 706332), (33, 642120), (36, 588610), (40, 529749), (44, 481590), (45, 470888), (55, 385272), (60, 353166), (66, 321060), (72, 294305), (88, 240795), (90, 235444), (99, 214040), (110, 192636), (120, 176583), (132, 160530), (165, 128424), (180, 117722), (198, 107020), (220, 96318), (264, 80265), (330, 64212), (360, 58861), (396, 53510), (440, 48159), (495, 42808), (660, 32106), (792, 26755), (990, 21404), (1320, 16053), (1980, 10702), (3960, 5351)]