21508140

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{29}}^1\times {\mathrm{47}}^1\times {\mathrm{263}}^1$

素因数の和:351

約数の個数: 96

約数和(自身を含む): 63866880

約数和(自身を除く): 42358740

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 29, 30, 47, 58, 60, 87, 94, 116, 141, 145, 174, 188, 235, 263, 282, 290, 348, 435, 470, 526, 564, 580, 705, 789, 870, 940, 1052, 1315, 1363, 1410, 1578, 1740, 2630, 2726, 2820, 3156, 3945, 4089, 5260, 5452, 6815, 7627, 7890, 8178, 12361, 13630, 15254, 15780, 16356, 20445, 22881, 24722, 27260, 30508, 37083, 38135, 40890, 45762, 49444, 61805, 74166, 76270, 81780, 91524, 114405, 123610, 148332, 152540, 185415, 228810, 247220, 358469, 370830, 457620, 716938, 741660, 1075407, 1433876, 1792345, 2150814, 3584690, 4301628, 5377035, 7169380, 10754070, 21508140]

約数ペア:

[(1, 21508140), (2, 10754070), (3, 7169380), (4, 5377035), (5, 4301628), (6, 3584690), (10, 2150814), (12, 1792345), (15, 1433876), (20, 1075407), (29, 741660), (30, 716938), (47, 457620), (58, 370830), (60, 358469), (87, 247220), (94, 228810), (116, 185415), (141, 152540), (145, 148332), (174, 123610), (188, 114405), (235, 91524), (263, 81780), (282, 76270), (290, 74166), (348, 61805), (435, 49444), (470, 45762), (526, 40890), (564, 38135), (580, 37083), (705, 30508), (789, 27260), (870, 24722), (940, 22881), (1052, 20445), (1315, 16356), (1363, 15780), (1410, 15254), (1578, 13630), (1740, 12361), (2630, 8178), (2726, 7890), (2820, 7627), (3156, 6815), (3945, 5452), (4089, 5260)]