287840

素因数分解:

$2^5\times 5^1\times 7^1\times {\mathrm{257}}^1$

素因数の和:279

約数の個数: 48

約数和(自身を含む): 780192

約数和(自身を除く): 492352

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 32, 35, 40, 56, 70, 80, 112, 140, 160, 224, 257, 280, 514, 560, 1028, 1120, 1285, 1799, 2056, 2570, 3598, 4112, 5140, 7196, 8224, 8995, 10280, 14392, 17990, 20560, 28784, 35980, 41120, 57568, 71960, 143920, 287840]

約数ペア:

[(1, 287840), (2, 143920), (4, 71960), (5, 57568), (7, 41120), (8, 35980), (10, 28784), (14, 20560), (16, 17990), (20, 14392), (28, 10280), (32, 8995), (35, 8224), (40, 7196), (56, 5140), (70, 4112), (80, 3598), (112, 2570), (140, 2056), (160, 1799), (224, 1285), (257, 1120), (280, 1028), (514, 560)]