21650960

素因数分解:

$2^4\times 5^1\times {\mathrm{127}}^1\times {\mathrm{2131}}^1$

素因数の和:2271

約数の個数: 40

約数和(自身を含む): 50758656

約数和(自身を除く): 29107696

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 127, 254, 508, 635, 1016, 1270, 2032, 2131, 2540, 4262, 5080, 8524, 10160, 10655, 17048, 21310, 34096, 42620, 85240, 170480, 270637, 541274, 1082548, 1353185, 2165096, 2706370, 4330192, 5412740, 10825480, 21650960]

約数ペア:

[(1, 21650960), (2, 10825480), (4, 5412740), (5, 4330192), (8, 2706370), (10, 2165096), (16, 1353185), (20, 1082548), (40, 541274), (80, 270637), (127, 170480), (254, 85240), (508, 42620), (635, 34096), (1016, 21310), (1270, 17048), (2032, 10655), (2131, 10160), (2540, 8524), (4262, 5080)]