20665980

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{29}}^1\times {\mathrm{37}}^1\times {\mathrm{107}}^1$

素因数の和:188

約数の個数: 144

約数和(自身を含む): 67223520

約数和(自身を除く): 46557540

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 29, 30, 36, 37, 45, 58, 60, 74, 87, 90, 107, 111, 116, 145, 148, 174, 180, 185, 214, 222, 261, 290, 321, 333, 348, 370, 428, 435, 444, 522, 535, 555, 580, 642, 666, 740, 870, 963, 1044, 1070, 1073, 1110, 1284, 1305, 1332, 1605, 1665, 1740, 1926, 2140, 2146, 2220, 2610, 3103, 3210, 3219, 3330, 3852, 3959, 4292, 4815, 5220, 5365, 6206, 6420, 6438, 6660, 7918, 9309, 9630, 9657, 10730, 11877, 12412, 12876, 15515, 15836, 16095, 18618, 19260, 19314, 19795, 21460, 23754, 27927, 31030, 32190, 35631, 37236, 38628, 39590, 46545, 47508, 48285, 55854, 59385, 62060, 64380, 71262, 79180, 93090, 96570, 111708, 114811, 118770, 139635, 142524, 178155, 186180, 193140, 229622, 237540, 279270, 344433, 356310, 459244, 558540, 574055, 688866, 712620, 1033299, 1148110, 1377732, 1722165, 2066598, 2296220, 3444330, 4133196, 5166495, 6888660, 10332990, 20665980]

約数ペア:

[(1, 20665980), (2, 10332990), (3, 6888660), (4, 5166495), (5, 4133196), (6, 3444330), (9, 2296220), (10, 2066598), (12, 1722165), (15, 1377732), (18, 1148110), (20, 1033299), (29, 712620), (30, 688866), (36, 574055), (37, 558540), (45, 459244), (58, 356310), (60, 344433), (74, 279270), (87, 237540), (90, 229622), (107, 193140), (111, 186180), (116, 178155), (145, 142524), (148, 139635), (174, 118770), (180, 114811), (185, 111708), (214, 96570), (222, 93090), (261, 79180), (290, 71262), (321, 64380), (333, 62060), (348, 59385), (370, 55854), (428, 48285), (435, 47508), (444, 46545), (522, 39590), (535, 38628), (555, 37236), (580, 35631), (642, 32190), (666, 31030), (740, 27927), (870, 23754), (963, 21460), (1044, 19795), (1070, 19314), (1073, 19260), (1110, 18618), (1284, 16095), (1305, 15836), (1332, 15515), (1605, 12876), (1665, 12412), (1740, 11877), (1926, 10730), (2140, 9657), (2146, 9630), (2220, 9309), (2610, 7918), (3103, 6660), (3210, 6438), (3219, 6420), (3330, 6206), (3852, 5365), (3959, 5220), (4292, 4815)]