18987160

素因数分解:

$2^3\times 5^1\times {\mathrm{257}}^1\times {\mathrm{1847}}^1$

素因数の和:2115

約数の個数: 32

約数和(自身を含む): 42910560

約数和(自身を除く): 23923400

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 257, 514, 1028, 1285, 1847, 2056, 2570, 3694, 5140, 7388, 9235, 10280, 14776, 18470, 36940, 73880, 474679, 949358, 1898716, 2373395, 3797432, 4746790, 9493580, 18987160]

約数ペア:

[(1, 18987160), (2, 9493580), (4, 4746790), (5, 3797432), (8, 2373395), (10, 1898716), (20, 949358), (40, 474679), (257, 73880), (514, 36940), (1028, 18470), (1285, 14776), (1847, 10280), (2056, 9235), (2570, 7388), (3694, 5140)]