18857240

素因数分解:

$2^3\times 5^1\times {\mathrm{23}}^1\times {\mathrm{103}}^1\times {\mathrm{199}}^1$

素因数の和:336

約数の個数: 64

約数和(自身を含む): 44928000

約数和(自身を除く): 26070760

約数列:

[1, 2, 4, 5, 8, 10, 20, 23, 40, 46, 92, 103, 115, 184, 199, 206, 230, 398, 412, 460, 515, 796, 824, 920, 995, 1030, 1592, 1990, 2060, 2369, 3980, 4120, 4577, 4738, 7960, 9154, 9476, 11845, 18308, 18952, 20497, 22885, 23690, 36616, 40994, 45770, 47380, 81988, 91540, 94760, 102485, 163976, 183080, 204970, 409940, 471431, 819880, 942862, 1885724, 2357155, 3771448, 4714310, 9428620, 18857240]

約数ペア:

[(1, 18857240), (2, 9428620), (4, 4714310), (5, 3771448), (8, 2357155), (10, 1885724), (20, 942862), (23, 819880), (40, 471431), (46, 409940), (92, 204970), (103, 183080), (115, 163976), (184, 102485), (199, 94760), (206, 91540), (230, 81988), (398, 47380), (412, 45770), (460, 40994), (515, 36616), (796, 23690), (824, 22885), (920, 20497), (995, 18952), (1030, 18308), (1592, 11845), (1990, 9476), (2060, 9154), (2369, 7960), (3980, 4738), (4120, 4577)]