18756280

素因数分解:

$2^3\times 5^1\times {\mathrm{61}}^1\times {\mathrm{7687}}^1$

素因数の和:7759

約数の個数: 32

約数和(自身を含む): 42899040

約数和(自身を除く): 24142760

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 61, 122, 244, 305, 488, 610, 1220, 2440, 7687, 15374, 30748, 38435, 61496, 76870, 153740, 307480, 468907, 937814, 1875628, 2344535, 3751256, 4689070, 9378140, 18756280]

約数ペア:

[(1, 18756280), (2, 9378140), (4, 4689070), (5, 3751256), (8, 2344535), (10, 1875628), (20, 937814), (40, 468907), (61, 307480), (122, 153740), (244, 76870), (305, 61496), (488, 38435), (610, 30748), (1220, 15374), (2440, 7687)]