18991170040

素因数分解:

$2^3\times 5^1\times {\mathrm{293}}^1\times {\mathrm{349}}^1\times {\mathrm{4643}}^1$

素因数の和:5296

約数の個数: 64

約数和(自身を含む): 43008084000

約数和(自身を除く): 24016913960

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 293, 349, 586, 698, 1172, 1396, 1465, 1745, 2344, 2792, 2930, 3490, 4643, 5860, 6980, 9286, 11720, 13960, 18572, 23215, 37144, 46430, 92860, 102257, 185720, 204514, 409028, 511285, 818056, 1022570, 1360399, 1620407, 2045140, 2720798, 3240814, 4090280, 5441596, 6481628, 6801995, 8102035, 10883192, 12963256, 13603990, 16204070, 27207980, 32408140, 54415960, 64816280, 474779251, 949558502, 1899117004, 2373896255, 3798234008, 4747792510, 9495585020, 18991170040]

約数ペア:

[(1, 18991170040), (2, 9495585020), (4, 4747792510), (5, 3798234008), (8, 2373896255), (10, 1899117004), (20, 949558502), (40, 474779251), (293, 64816280), (349, 54415960), (586, 32408140), (698, 27207980), (1172, 16204070), (1396, 13603990), (1465, 12963256), (1745, 10883192), (2344, 8102035), (2792, 6801995), (2930, 6481628), (3490, 5441596), (4643, 4090280), (5860, 3240814), (6980, 2720798), (9286, 2045140), (11720, 1620407), (13960, 1360399), (18572, 1022570), (23215, 818056), (37144, 511285), (46430, 409028), (92860, 204514), (102257, 185720)]