20858480

素因数分解:

$2^4\times 5^1\times {\mathrm{127}}^1\times {\mathrm{2053}}^1$

素因数の和:2193

約数の個数: 40

約数和(自身を含む): 48901632

約数和(自身を除く): 28043152

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 127, 254, 508, 635, 1016, 1270, 2032, 2053, 2540, 4106, 5080, 8212, 10160, 10265, 16424, 20530, 32848, 41060, 82120, 164240, 260731, 521462, 1042924, 1303655, 2085848, 2607310, 4171696, 5214620, 10429240, 20858480]

約数ペア:

[(1, 20858480), (2, 10429240), (4, 5214620), (5, 4171696), (8, 2607310), (10, 2085848), (16, 1303655), (20, 1042924), (40, 521462), (80, 260731), (127, 164240), (254, 82120), (508, 41060), (635, 32848), (1016, 20530), (1270, 16424), (2032, 10265), (2053, 10160), (2540, 8212), (4106, 5080)]