18987880

素因数分解:

$2^3\times 5^1\times {\mathrm{23}}^1\times {\mathrm{20639}}^1$

素因数の和:20673

約数の個数: 32

約数和(自身を含む): 44582400

約数和(自身を除く): 25594520

約数列:

[1, 2, 4, 5, 8, 10, 20, 23, 40, 46, 92, 115, 184, 230, 460, 920, 20639, 41278, 82556, 103195, 165112, 206390, 412780, 474697, 825560, 949394, 1898788, 2373485, 3797576, 4746970, 9493940, 18987880]

約数ペア:

[(1, 18987880), (2, 9493940), (4, 4746970), (5, 3797576), (8, 2373485), (10, 1898788), (20, 949394), (23, 825560), (40, 474697), (46, 412780), (92, 206390), (115, 165112), (184, 103195), (230, 82556), (460, 41278), (920, 20639)]