2639980

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{109}}^1\times {\mathrm{173}}^1$

素因数の和:298

約数の個数: 48

約数和(自身を含む): 6431040

約数和(自身を除く): 3791060

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 109, 140, 173, 218, 346, 436, 545, 692, 763, 865, 1090, 1211, 1526, 1730, 2180, 2422, 3052, 3460, 3815, 4844, 6055, 7630, 12110, 15260, 18857, 24220, 37714, 75428, 94285, 131999, 188570, 263998, 377140, 527996, 659995, 1319990, 2639980]

約数ペア:

[(1, 2639980), (2, 1319990), (4, 659995), (5, 527996), (7, 377140), (10, 263998), (14, 188570), (20, 131999), (28, 94285), (35, 75428), (70, 37714), (109, 24220), (140, 18857), (173, 15260), (218, 12110), (346, 7630), (436, 6055), (545, 4844), (692, 3815), (763, 3460), (865, 3052), (1090, 2422), (1211, 2180), (1526, 1730)]