21021040

素因数分解:

$2^4\times 5^1\times {\mathrm{127}}^1\times {\mathrm{2069}}^1$

素因数の和:2209

約数の個数: 40

約数和(自身を含む): 49282560

約数和(自身を除く): 28261520

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 127, 254, 508, 635, 1016, 1270, 2032, 2069, 2540, 4138, 5080, 8276, 10160, 10345, 16552, 20690, 33104, 41380, 82760, 165520, 262763, 525526, 1051052, 1313815, 2102104, 2627630, 4204208, 5255260, 10510520, 21021040]

約数ペア:

[(1, 21021040), (2, 10510520), (4, 5255260), (5, 4204208), (8, 2627630), (10, 2102104), (16, 1313815), (20, 1051052), (40, 525526), (80, 262763), (127, 165520), (254, 82760), (508, 41380), (635, 33104), (1016, 20690), (1270, 16552), (2032, 10345), (2069, 10160), (2540, 8276), (4138, 5080)]