21034980

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{137}}^1\times {\mathrm{853}}^1$

素因数の和:1005

約数の個数: 72

約数和(自身を含む): 64347192

約数和(自身を除く): 43312212

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 30, 36, 45, 60, 90, 137, 180, 274, 411, 548, 685, 822, 853, 1233, 1370, 1644, 1706, 2055, 2466, 2559, 2740, 3412, 4110, 4265, 4932, 5118, 6165, 7677, 8220, 8530, 10236, 12330, 12795, 15354, 17060, 24660, 25590, 30708, 38385, 51180, 76770, 116861, 153540, 233722, 350583, 467444, 584305, 701166, 1051749, 1168610, 1402332, 1752915, 2103498, 2337220, 3505830, 4206996, 5258745, 7011660, 10517490, 21034980]

約数ペア:

[(1, 21034980), (2, 10517490), (3, 7011660), (4, 5258745), (5, 4206996), (6, 3505830), (9, 2337220), (10, 2103498), (12, 1752915), (15, 1402332), (18, 1168610), (20, 1051749), (30, 701166), (36, 584305), (45, 467444), (60, 350583), (90, 233722), (137, 153540), (180, 116861), (274, 76770), (411, 51180), (548, 38385), (685, 30708), (822, 25590), (853, 24660), (1233, 17060), (1370, 15354), (1644, 12795), (1706, 12330), (2055, 10236), (2466, 8530), (2559, 8220), (2740, 7677), (3412, 6165), (4110, 5118), (4265, 4932)]