20748760

素因数分解:

$2^3\times 5^1\times {\mathrm{19}}^1\times {\mathrm{23}}^1\times {\mathrm{1187}}^1$

素因数の和:1240

約数の個数: 64

約数和(自身を含む): 51321600

約数和(自身を除く): 30572840

約数列:

[1, 2, 4, 5, 8, 10, 19, 20, 23, 38, 40, 46, 76, 92, 95, 115, 152, 184, 190, 230, 380, 437, 460, 760, 874, 920, 1187, 1748, 2185, 2374, 3496, 4370, 4748, 5935, 8740, 9496, 11870, 17480, 22553, 23740, 27301, 45106, 47480, 54602, 90212, 109204, 112765, 136505, 180424, 218408, 225530, 273010, 451060, 518719, 546020, 902120, 1037438, 1092040, 2074876, 2593595, 4149752, 5187190, 10374380, 20748760]

約数ペア:

[(1, 20748760), (2, 10374380), (4, 5187190), (5, 4149752), (8, 2593595), (10, 2074876), (19, 1092040), (20, 1037438), (23, 902120), (38, 546020), (40, 518719), (46, 451060), (76, 273010), (92, 225530), (95, 218408), (115, 180424), (152, 136505), (184, 112765), (190, 109204), (230, 90212), (380, 54602), (437, 47480), (460, 45106), (760, 27301), (874, 23740), (920, 22553), (1187, 17480), (1748, 11870), (2185, 9496), (2374, 8740), (3496, 5935), (4370, 4748)]