21445980

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{137}}^1\times {\mathrm{2609}}^1$

素因数の和:2758

約数の個数: 48

約数和(自身を含む): 60510240

約数和(自身を除く): 39064260

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, 60, 137, 274, 411, 548, 685, 822, 1370, 1644, 2055, 2609, 2740, 4110, 5218, 7827, 8220, 10436, 13045, 15654, 26090, 31308, 39135, 52180, 78270, 156540, 357433, 714866, 1072299, 1429732, 1787165, 2144598, 3574330, 4289196, 5361495, 7148660, 10722990, 21445980]

約数ペア:

[(1, 21445980), (2, 10722990), (3, 7148660), (4, 5361495), (5, 4289196), (6, 3574330), (10, 2144598), (12, 1787165), (15, 1429732), (20, 1072299), (30, 714866), (60, 357433), (137, 156540), (274, 78270), (411, 52180), (548, 39135), (685, 31308), (822, 26090), (1370, 15654), (1644, 13045), (2055, 10436), (2609, 8220), (2740, 7827), (4110, 5218)]