18001980

素因数分解:

$2^2\times 3^3\times 5^1\times {\mathrm{17}}^1\times {\mathrm{37}}^1\times {\mathrm{53}}^1$

素因数の和:125

約数の個数: 192

約数和(自身を含む): 62052480

約数和(自身を除く): 44050500

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 17, 18, 20, 27, 30, 34, 36, 37, 45, 51, 53, 54, 60, 68, 74, 85, 90, 102, 106, 108, 111, 135, 148, 153, 159, 170, 180, 185, 204, 212, 222, 255, 265, 270, 306, 318, 333, 340, 370, 444, 459, 477, 510, 530, 540, 555, 612, 629, 636, 666, 740, 765, 795, 901, 918, 954, 999, 1020, 1060, 1110, 1258, 1332, 1431, 1530, 1590, 1665, 1802, 1836, 1887, 1908, 1961, 1998, 2220, 2295, 2385, 2516, 2703, 2862, 3060, 3145, 3180, 3330, 3604, 3774, 3922, 3996, 4505, 4590, 4770, 4995, 5406, 5661, 5724, 5883, 6290, 6660, 7155, 7548, 7844, 8109, 9010, 9180, 9435, 9540, 9805, 9990, 10812, 11322, 11766, 12580, 13515, 14310, 16218, 16983, 17649, 18020, 18870, 19610, 19980, 22644, 23532, 24327, 27030, 28305, 28620, 29415, 32436, 33337, 33966, 35298, 37740, 39220, 40545, 48654, 52947, 54060, 56610, 58830, 66674, 67932, 70596, 81090, 84915, 88245, 97308, 100011, 105894, 113220, 117660, 121635, 133348, 162180, 166685, 169830, 176490, 200022, 211788, 243270, 264735, 300033, 333370, 339660, 352980, 400044, 486540, 500055, 529470, 600066, 666740, 900099, 1000110, 1058940, 1200132, 1500165, 1800198, 2000220, 3000330, 3600396, 4500495, 6000660, 9000990, 18001980]

約数ペア:

[(1, 18001980), (2, 9000990), (3, 6000660), (4, 4500495), (5, 3600396), (6, 3000330), (9, 2000220), (10, 1800198), (12, 1500165), (15, 1200132), (17, 1058940), (18, 1000110), (20, 900099), (27, 666740), (30, 600066), (34, 529470), (36, 500055), (37, 486540), (45, 400044), (51, 352980), (53, 339660), (54, 333370), (60, 300033), (68, 264735), (74, 243270), (85, 211788), (90, 200022), (102, 176490), (106, 169830), (108, 166685), (111, 162180), (135, 133348), (148, 121635), (153, 117660), (159, 113220), (170, 105894), (180, 100011), (185, 97308), (204, 88245), (212, 84915), (222, 81090), (255, 70596), (265, 67932), (270, 66674), (306, 58830), (318, 56610), (333, 54060), (340, 52947), (370, 48654), (444, 40545), (459, 39220), (477, 37740), (510, 35298), (530, 33966), (540, 33337), (555, 32436), (612, 29415), (629, 28620), (636, 28305), (666, 27030), (740, 24327), (765, 23532), (795, 22644), (901, 19980), (918, 19610), (954, 18870), (999, 18020), (1020, 17649), (1060, 16983), (1110, 16218), (1258, 14310), (1332, 13515), (1431, 12580), (1530, 11766), (1590, 11322), (1665, 10812), (1802, 9990), (1836, 9805), (1887, 9540), (1908, 9435), (1961, 9180), (1998, 9010), (2220, 8109), (2295, 7844), (2385, 7548), (2516, 7155), (2703, 6660), (2862, 6290), (3060, 5883), (3145, 5724), (3180, 5661), (3330, 5406), (3604, 4995), (3774, 4770), (3922, 4590), (3996, 4505)]