19921460

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{193}}^1\times {\mathrm{397}}^1$

素因数の和:612

約数の個数: 48

約数和(自身を含む): 45400656

約数和(自身を除く): 25479196

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 193, 260, 386, 397, 772, 794, 965, 1588, 1930, 1985, 2509, 3860, 3970, 5018, 5161, 7940, 10036, 10322, 12545, 20644, 25090, 25805, 50180, 51610, 76621, 103220, 153242, 306484, 383105, 766210, 996073, 1532420, 1992146, 3984292, 4980365, 9960730, 19921460]

約数ペア:

[(1, 19921460), (2, 9960730), (4, 4980365), (5, 3984292), (10, 1992146), (13, 1532420), (20, 996073), (26, 766210), (52, 383105), (65, 306484), (130, 153242), (193, 103220), (260, 76621), (386, 51610), (397, 50180), (772, 25805), (794, 25090), (965, 20644), (1588, 12545), (1930, 10322), (1985, 10036), (2509, 7940), (3860, 5161), (3970, 5018)]