21182940

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{137}}^1\times {\mathrm{859}}^1$

素因数の和:1011

約数の個数: 72

約数和(自身を含む): 64799280

約数和(自身を除く): 43616340

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, 859, 1233, 1370, 1644, 1718, 2055, 2466, 2577, 2740, 3436, 4110, 4295, 4932, 5154, 6165, 7731, 8220, 8590, 10308, 12330, 12885, 15462, 17180, 24660, 25770, 30924, 38655, 51540, 77310, 117683, 154620, 235366, 353049, 470732, 588415, 706098, 1059147, 1176830, 1412196, 1765245, 2118294, 2353660, 3530490, 4236588, 5295735, 7060980, 10591470, 21182940]

約数ペア:

[(1, 21182940), (2, 10591470), (3, 7060980), (4, 5295735), (5, 4236588), (6, 3530490), (9, 2353660), (10, 2118294), (12, 1765245), (15, 1412196), (18, 1176830), (20, 1059147), (30, 706098), (36, 588415), (45, 470732), (60, 353049), (90, 235366), (137, 154620), (180, 117683), (274, 77310), (411, 51540), (548, 38655), (685, 30924), (822, 25770), (859, 24660), (1233, 17180), (1370, 15462), (1644, 12885), (1718, 12330), (2055, 10308), (2466, 8590), (2577, 8220), (2740, 7731), (3436, 6165), (4110, 5154), (4295, 4932)]